Past Articles (1994-2008)

1994 - 2008

Year 2008

Peer Reviewed Journal Papers
(Invited paper) Boon S. Ooi, Hery S. Djie, Yang Wang, Chee-Loon Tan, James C.M. Hwang, Xiao-Ming Fang, Joel M. Fastenau, Amy W.K. Liu, Gerard T. Dang, and Wayne H. Chang, "Quantum dashes on InP substrate for broadband emitter applications", IEEE Journal of Selected Topics in Quantum Electronics, Vol. 14, pp. 1230-1238, July/August, 2008. Hery S. Djie, Yang Wang, Yun-Hsiang Ding, Dong-Ning Wang, James C.M. Hwang, Xiao-Ming Fang, Ying Wu, Joel M. Fastenau, Amy W.K. Liu, Gerard T. Dang, Wayne H. Chang, and Boon S. Ooi, "Quantum dash intermixing", IEEE Journal of Selected Topics in Quantum Electronics, Vol. 14, pp. 1239-1249, July/August, 2008. Y.-H. Ding, V. Hongpinyo, H.S. Djie, and B.S. Ooi, "Nano-scale bandgap engineering using nitrogen implantation: quantum-well, quantum-dash and quantum-dot nanostructures", Advanced Materials Research, Vol. 31, pp. 182-184, 2008. Boon S. Ooi, Hery S. Djie, Amr S. Helmy, and James C.M. Hwang, "Broadband emission in InAs/InGaAlAs quantum-dash-in-well laser", Advanced Materials Research, Vol. 31, pp. 173-175, 2008. Y. Wang, H.S. Djie, B.S. Ooi, J.C.M. Hwang, Y. Wu, X.-M. Fang, J.M. Fastenau, W.K. Liu, G.T. Dang, and W.H. Chang, "Monolithic InAs/InAlGaAs/InP quantum-dash-in-well extended cavity laser fabricated by postgrowth intermixing", Laser Physics Journal, Vol. 18, No. 4, pp. 400-402, 2008. Ts. Ivanov, V. Donchev, K. Bachev, Y.-H. Ding, Y. Wang, H.S. Djie, and B.S. Ooi, "Bandgap engineering of InAs/InGaAlAs quantum-dashes-in-well laser structures: A surface photonvoltage spectroscopy study", Journal of Physics: Conference Series, Vol. 113, 012033, 2008. C.L. Tan, Y. Wang, H.S. Djie, and B.S. Ooi, "The role of optical gain broadening in the ultrabroadband InGaAs/GaAs interband quantum-dot laser", Computational Material Science, Vol. 44, No. 1, pp. 167-173, November 2008. C.L. Tan, Y. Wang, H.S. Djie, and B.S. Ooi, "Simulation of characteristics of broadband quantum dot lasers", Optical and Quantum Electronics, Vol. 40, pp. 391-395, July 2008. C.L. Tan, H.S. Djie, Y. Wang, C.E. Dimas, V. Hongpinyo, Y.H. Ding, and B.S. Ooi, "Wavelength tuning and emission width widening of ultrabroad quantum dash interband laser", Applied Physics Letter, Vol. 93, No. 111101, Sep 2008. (Also featured in Compound Semiconductor - Research Review Column in the issue of November 2008) C. Chen, Y. Wang, C.L. Tan, H.S. Djie, B.S. Ooi, J.C.M. Hwang, G.T. Dang, and W.H. Chang, "Effects of intermixing on gain and alpha factors of quantum-dash lasers", IEEE Photon. Technol. Lett., Vol. 20, pp. 1654-1656, October 2008. V. Hongpinyo, Y.H. Ding, J. Anderson, H.S. Djie, B.S. Ooi, R.R. Du, A. Ganjoo, and H. Jain, "Sputtered SiO2 Induced Atomic Interdiffusion in Semiconductor Nano Heterostructures", Advanced Materials Research, Vol. 31, pp. 33-35, 2008.
Conferences and Proceedings (2008)
(Invited talk) Boon S. Ooi, C.L. Tan, C. Chen, Y.H. Ding, V. Hongpinyo, C.E. Dimas, Y. Wang, H.S. Djie, and J.C.M. Hwang, "Photonic Integration and ultra-broadband emitter using quantum-dash intermixing", Fourth International Symposium on Integrated Optoelectronics, 214th Meeting of the Electrochemical Society, Honolulu, Hawaii, USA, 12-17 October 2008. C.L. Tan, H.S. Djie, Y. Wang, D.N. Wang, J.C.M. Hwang, and B.S. Ooi, "Extension of quasi-supercontinuum generation in multiple-bandgap semiconductor quantum-dash laser", Proceeding of Conference on Lasers and Electro-Optics (IEEE CLEO'08), San Jose Convention Center, San Jose, California, USA, 4-9 May 2008. (Oral Presentation). Y. Wang, H.S. Djie, V. Hongpingyo, C.L. Tan, B.S. Ooi, J.C.M. Hwang, X.M. Fang, Y. Wu, J.M. Fastenau, W.K. Liu, G.T. Dang, and W.H. Chang, "Epitaxial growth of high quality InAs/InGaAlAs quantum-dash-in-well structure on InP", IEEE 20th Conference on Indium Phosphide and Related Materials (IEEE IPRM'08), Versailles, France, 25-29 May 2008. (Poster Presentation). X. Mu, Y.J. Ding, and B.S. Ooi, "Cascaded exciton relaxation resonantly enhanced by LO phonon in vertically-stacked INAs quantum dots on InP", Conference on Lasers and Electro-Optics (IEEE CLEO'08), San Jose Convention Center, San Jose, California, USA, 4-9 May 2008. (Oral Presentation). C.L. Tan, Y. Wang, H.S. Djie, and B.S. Ooi, "Quasi-supercontinuum interband lasing characteristics of quantum dot nanostructures", Proceeding of IEEE 8th International Conference on Numerical Simulation of Optoelectronic Devices (IEEE NUSOD'08), University of Nottingham, United Kingdom, 1-5 September 2008. (Oral Presentation). C.L. Tan, H.S. Djie, C.E. Dimas, V. Hongpinyo, Y.H. Ding, and B.S. Ooi, "Realization of extended ultrabroadband quantum-dash laser emission using postgrowth intermixing", 21st Annual Lasers and Electro-Optics Society Meeting (IEEE LEOS 2008 Annual Meeting), Newport Beach, California, USA, 9-13 November 2008. (Oral Presentation). C.L. Tan, H.S. Djie, C.E. Dimas, V. Hongpinyo, Y.H. Ding, and B.S. Ooi, "The effect of nonequilibrium carrier distribution on supercontinuum broadband quantum-dash laser emission", 21st Annual Lasers and Electro-Optics Society Meeting (IEEE LEOS 2008 Annual Meeting), Newport Beach, California, USA, 9-13 November 2008. (Oral Presentation). C. Chen, S. Halder, B.S. Ooi, and J.C.M. Hwang, "Intrinsic response of quantum dash lasers under optical modulation", 21st Annual Lasers and Electro-Optics Society Meeting (IEEE LEOS 2008 Annual Meeting), Newport Beach, California, USA, 9-13 November 2008. (Oral Presentation). C.E. Dimas, C.L. Tan, V. Hongpingyo, Y.H. Ding, H.S. Djie, and B.S. Ooi, "Broadband Flat-top Superluminescent Diode with Low Spectral Modulation at 850 nm", IEEE Photonics Global 2008, SMU Conference Centre, Singapore, 8-11 December, 2008. (Oral Presentation). V. Hongpinyo, Y.H. Ding, C.E. Dimas, Y. Wang, B.S. Ooi, W. Qiu, L.L. Goddard, E.M. Behymer, G.D. Cole, and T.C. Bond, "Intermixing of InGaAs/GaAs Quantum Well Using Multiple Cycles Annealing", IEEE Photonics Global 2008, SMU Conference Centre, Singapore, 8-11 December, 2008. (Oral Presentation). Y.H. Ding, C.L. Tan, V. Hongpinyo, C.E. Dimas, Y. Wang, C. Chen, H.S. Djie, and B.S. Ooi, "Far-field patterns of Quantum Well, Quantum Dash, and Quantum Dot Laser Diodes", IEEE Photonics Global 2008, SMU Conference Centre, Singapore, 8-11 December, 2008. (Oral Presentation). C. Chen, Y. Wang, C.L. Tan, H.S. Djie, B.S. Ooi, and J.C.M. Hwang, "Gain and alpha factor of intermixed InAs/InP quantum-dash lasers", IEEE Photonics Global 2008, SMU Conference Centre, Singapore, 8-11 December, 2008. (Oral Presentation). C.L. Tan, H.S. Djie, C.E. Dimas, V. Hongpinyo, Y.H. Ding, and B.S. Ooi, "Bandgap-engineered broadband stimulated emission in semiconductor quantum dash interband laser", IEEE Photonics Global 2008, SMU Conference Centre, Singapore, 8-11 December, 2008. (Oral Presentation).

Year 2007

Peer Reviewed Journal Papers
H.S. Djie, B.S. Ooi, X.-M. Fang, Y. Wu, J.M. Fastenau, W.K. Liu, and M. Hopkinson, "Room temperature broadband emission of InGaAs/GaAs quantum-dots laser", Opt. Lett., vol. 32, no. 1, January 1, 2007. H.S. Djie, Y. Wang, B.S. Ooi, D.-N. Wang, J.C.M. Hwang, G.T. Dang, and W.H. Chang, "Bandgap tuning of InAs/InAlGaAs quantum-dash-in-well laser using postgrowth intermixing", Electronics Letters, vol. 43, no. 1, January 4. H.S. Djie, Y. Wang, D. Negro, and B.S. Ooi, "Postgrowth band gap trimming of InAs/InAlGaAs quantum-dash-in-well laser", Applied Physics Letter, vol. 90, Art.: 031101, 2007. (This paper also featured in Virtual J. Nano Science and Technology, vol. 15, issue 4, January 2007). V. Donchev, Ts. Ivanov, Y. Wang, H.S. Djie, and B.S. Ooi, "Surface photovoltage spectroscopy of interdiffused InAs/InGaAsAlAs quantum dots", Physica Status Solidi (c),4, No. 2, 412, 2007. H.S. Djie, C.E. Dimas, D.N. Wang, B.S. Ooi, J.C.M. Hwang, G.T. Dang, and W.H. Chang, "InGaAs/GaAs Quantum-Dot Superluminescent Diode for Optical Sensor and Imaging", IEEE Sensors Journal, Vol. 7, No. 2, pp. 251-257, Feb 2007. Ts. Ivanov, V. Donchev, Y. Wang, H.S. Djie, and B.S. Ooi, "Interdiffused InAs/InGaAlAs quantum dashes-in-well structures studied by surface photovoltage spectroscopy", J. Apply. Phys., Vol. 101, No. 114309, Jun 2007. C.L. Tan, Y. Wang, H.S. Djie, and B.S. Ooi, "Role of optical gain broadening in the broadband semiconductor quantum-dot laser", Appl. Phys. Lett., Vol. 91, No. 061117, Aug 2007. (This paper also featured in Virtual J. Nano Science and Technology, vol. 16, issue 8, August 2007). H.S. Djie, C.L. Tan, B.S. Ooi, J.C.M. Hwang, X.-M. Fang, Y. Wu, J.M. Fastenau, W.K. Liu, G.T. Dang, and W.H. Chang, "Ultra-broad stimulated emission from quantum-dash laser", Appl. Phys. Lett., Vol. 91, No. 111116, Sep 2007.
Conferences and Proceedings (2007)
H.S. Djie, Y. Wang, B.S. Ooi, D.-N. Wang, J.C.M. Hwang, Y. Wu, X.-M. Fang, J.M. Fastenau, W.K. Liu, G.T. Dang, and W.H. Chang, "Postgrowth wavelength engineering of InAs/InAlGaAs/InP quantum-dash-in-well lasers", Proceeding of SPIE, presented in Photonics West, San Jose, USA, Jan 2007. C.E. Dimas, R. Merola, C. Vishton, H.S. Djie, and B.S. Ooi, "Broadband, low ripple 860nm GaAs/AlGaAs quantum well superluminescent diode", Proceeding of SPIE, presented in Photonics West, San Jose, USA, Jan 2007. Y. Wang, D. Negro, H.S. Djie, and B.S. Ooi, "Quantum-confined Stark effects in interdiffused semiconductor quantum dots", Proceeding of SPIE, presented in Photonics West, San Jose, USA, Jan 2007. Y.-H. Ding, V. Hongpinyo, H.S. Djie, and B.S. Ooi, "Nano-scale bandgap engineering using Nitrogen implantation: quantum-well and quantum-wire nanostructures", Proceeding of International Conference on Materials for Advance Technologies (ICMAT) 2007 - Symposium D: Semiconductor Photonics: Nano-Structured Materials and Devices, 1-6 Jul 2007, Singapore. (Oral Presentation, refereed). Y.-H. Ding, V. Hongpinyo, H.S. Djie, and B.S. Ooi, "Semiconductor Photonic Integration Using Cu-doped SiO2 Induced Intermixing", Wireless & Optical Communications Conference (WOCC) 2007, 27-28 April, 2007, New Jersey. (Poster Presentation). C. Chen, C.L. Tan, S. Halder, Y. Wang, B.S. Ooi, and J.C.M. Hwang, "Gain and linewidth enhancement factor in semiconductor quantum dash-in-well laser", Wireless & Optical Communications Conference (WOCC) 2007, 27-28 April. 2007, New Jersey. (Poster Presentation). C.L. Tan, Y. Wang, H.S. Djie, and B.S. Ooi, "The role of optical gain broadening in the ultrabroadband InGaAs/GaAs interband quantum-dot laser", Proceeding of International Conference on Materials for Advance Technologies (ICMAT) 2007 - Symposium O: Frontiers in Computational Materials Science, 1-6 Jul 2007, Singapore. (Oral Presentation, refereed). Y. Wang, C. Chen, C.L. Tan, S. Halder, H.S. Djie, B.S. Ooi, and J.C.M. Hwang, "Gain and linewidth enhancement factor of interdiffused InAs/InAlGaAs/InP quantum-dash-in-well laser", Proceeding of International Conference on Materials for Advance Technologies (ICMAT) 2007 - Symposium D: Semiconductor Photonics: Nano-Structured Materials and Devices, 1-6 Jul 2007, Singapore. (Oral Presentation, refereed). C.L. Tan, Y. Wang, H.S. Djie, and B.S. Ooi, "Simulation of derivative characteristics of broadband quantum dot lasers", IEEE 7th International Conference on Numerical Simulation of Optoelectronic Devices (IEEE NUSOD), 24-27 September 2007, University of Delaware, United States. (Oral Presentation, refereed).

Year 2006

Peer Reviewed Journal Papers
(US Patent) Boon-Siew Ooi and Hery Susanto Djie, "Ultrabroadband semiconductor laser", US Patent disclosure, 9 Sep 2006. Y. Wang, H.S. Djie, and B.S. Ooi, "Quantum-confined Stark effect in interdiffused quantum dots", Appl. Phys. Lett., vol. 89, pp. 151104, 2006. H.S. Djie, Y. Wang, B.S. Ooi, D.N. Wang, J.C.M. Hwang, G.T. Dang, and W.H. Chang, "Defect annealing of InAs/InAlGaAs quantum-dash-in-asymmetric-well laser", IEEE Photon. Technol. Lett. vol. 16, pp. 2329, 2006. H.S. Djie, B.S. Ooi, and O. Gunawan, "Quantum dot intermixing using excimer laser irradiation", Appl. Phys. Lett., vol. 89, pp. 081901, 2006. Also cited by Virtual J. Nano Science and Technology, vol. 14, issue 10, Sep 2006. H.S. Djie, C.E. Dimas, and B.S. Ooi, "Wideband quantum-dash-in-well superluminescent diode at 1.6 um", IEEE Photon. Technol. Lett., vol. 18, pp. 1747 - 1749, 2006. H.S. Djie, D.-N. Wang, B.S. Ooi, J.C.M. Hwang, X.-M. Fang, Y. Wu, J.M. Fastenau, and W.K. Liu, "Intermixing of InGaAs quantum-dots grown by cycled monolayer deposition", J. Appl. Phys., vol. 100, pp. 033527, 2006. H.S. Djie, D.-N. Wang, B.S. Ooi, J.C.M. Hwang, X.-M. Fang, Y. Wu, J.M. Fastenau, and W.K. Liu, "Emission wavelength trimming of self-assembled InGaAs/GaAs quantum dots with GaAs/AlGaAs superlattices by rapid thermal annealing", Thin Solid Films, Vol. 515, pp. 4344-4347, Sep 2006. Y. Wang, H.S. Djie, B.S. Ooi, P. Dowd, P. Rotalla, V. Aimez, Y. Cao, S.R. Johnson, and Y.-H. Zhang, "Interdiffusion effect on quantum well structures grown on GaSb substrate", Thin Solid Films, Vol. 515, pp. 4352-4355, Sep 2006. D. Nie, T. Mei, H.S. Djie, B.S. Ooi, and X.H. Zhang, "Improving crystal quality of InGaAs/GaAs quantum dots by inductively coupled Ar plasma", Appl. Phys. Lett., vol. 88, pp. 251102, 2006. Also cited by Virtual J. Nano Science and Technology, vol. 14, issue 1, Jul 2006. Y. Wang, H.S. Djie, and B.S. Ooi, "Low-loss monolithic extended cavity laser by low-energy ion-implantation induced intermixing", Electronics Letters, vol.42, no.12, June 8th, 2006. H.S. Djie, O. Gunawan, D.-N. Wang, B.S. Ooi, and J.C.M. Hwang, "Group-III vacancy induced InGaAs quantum-dot interdiffusion", Physical Review B, vol.73, Art:155324 (6 pages), May 15, 2006. Y. Wang, H.S. Djie, and B.S. Ooi, "Group III intermixing in InAs/InAlGaAs quantum dots-in-well", Applied Physics Letters, vol.88, Art.:111110, 2006. Y. Huang, Y. Xiao, G. Xu, S. Chang, Y.-G. Zhao, R. Wang, S.T. Ho, and B.S. Ooi, "A single-directional microcavity laser with microloop and widened medium realized with quantum-well intermixing", IEEE Photonic Technology Letters, vol.18 (1), pp130-132, 2006. C.E. Dimas, H.S. Djie, and B.S. Ooi, "Superluminescent diodes using quantum dots superlattice", Journal of Crystal Growth, 288 (1), pp.153-156, 2006. H.S. Djie, B.S. Ooi, and V. Aimez, "InGaAs/GaAs quantum dot intermixing using arsenic and phosphorus ion implantation induced disordering", Journal of Crystal Growth, vol. 288(1), pp 40-43, 2006. M.K. Chin, C.K. Chia, K. Pita, J.H. Teng, and B.S. Ooi, "Introduction to the special issue on photonics materials and devices - C Preface", Journal of Crystal Growth, 288 (1), pp.1-1, 2006. X. Mu, Y.J. Ding, B.S. Ooi, and M. Hopkinson, "Investigation of carrier dynamics on InAs quantum dots embedded in InGaAs/GaAs quantum wells based on time-resolved pump and probe differential photoluminescence", Appl. Phys. Lett, 89, 181924, 2006.
Conferences and Proceedings (2006)
(Postdeadline paper) H.S. Djie, C.E. Dimas, Y. Wang, C.L. Tan, B.S. Ooi, D.-N. Wang, J.C.M. Hwang, X.-M. Fang, Y. Wu, J.M. Fastenau, W.K. Liu, G.T. Dang, W.H. Chang, and M. Hopkinson, "Ultrabroadband interband semiconductor quantum-dot/dash laser", 19th Annual Meeting of IEEE Lasers and Electro-Optics Society (LEOS), Montreal, Canada, Oct 29 - Nov 2, 2006, paper PD 1.3. (Invited talk) B.S. Ooi, H.S. Djie, Y. Wang, C.E. Dimas, D.-N. Wang, and J.C.M. Hwang, "Monolithic integration of photonic devices using interdiffused heterostructures", to be presented in the 210th Meeting of The Electrochemical Society (ECS), Cancun, Mexico, Oct. 29 - Nov 3, 2006. H.S. Djie, Y. Wang, B.S. Ooi, D.-N. Wang, J.C.M. Hwang, Y. Wu, X.-M. Fang, J.M. Fastenau, W.K. Liu, G.T. Dang, and W.H. Chang, "Postgrowth wavelength engineering of InAs/InAlGaAs/InP quantum-dash-in-well lasers", to be presented in SPIE Photonics West, San Jose, USA, Jan 2007. C.E. Dimas, R. Merola, C. Vishton, H.S. Djie, and B.S. Ooi, "Broadband, low ripple 860nm GaAs/AlGaAs quantum well superluminescent diode", Proceeding of SPIE, presented in Photonics West, San Jose, USA, [6475-48] 347, Jan 2007. Y. Wang, D. Negro, H.S. Djie, and B.S. Ooi, "Quantum-confined Stark effects in interdiffused semiconductor quantum dots", to be presented in SPIE Photonics West, San Jose, USA, Jan 2007. D. Negro, Y. Wang, H.S. Djie, B.S. Ooi, Ts. Ivanov, and V. Donchev, "Absorption spectroscopy of InAs/InGaAlAs/InP quantum-dash-in-well laser", to be presented in SPIE Photonics West, San Jose, USA, Jan 2007. H.S. Djie, Y. Wang, B.S. Ooi, D.-N. Wang, J.C.M. Hwang, G.T. Dang, and W.H. Chang, "High quality postgrowth emission wavelength engineering of InAs/InAlGaAs/InP quantum dash-in-well laser", Int. Conf. IEEE LEOS, Montreal-CA, Oct 29-Nov 2, 2006. V. Donchev, Ts. Ivanov, K. Kirilov, K. Germanova, Y. Wang, H.S. Djie, and B.S. Ooi, "Surface photovoltage spectroscopy of interdiffused InAs/InGaAlAs quantum dots", Proc. Int. Conf. Superlattices, Nano-Structures and Nano-Devices (CSNN), Istanbul, Turkey, 30 Jul - 4 Aug 2006, p. 169. H.S. Djie, Y. Wang, and B.S. Ooi, "Nitrogen implantation induced intermixing in InAs/InAlGaAs/InP dots-in-well laser", Proc. Int. Conf. IEEE 14th Indium Phosphide and Related Materials (IPRM), Princeton, New Jersey, 7-11 May 2006, paper WP1, pp. 270-273. Y. Wang, H.S. Djie, and B.S. Ooi, "Experimental and theoretical study of multiple cations intermixing in InP-based quantum dot-in-well structure", Proceeding of SPIE, presented in Photonics West, San Jose, 23-17 January, 2006. (Oral Presentation, refereed). C.E. Dimas, Y. Wang, H.S. Djie, and B.S. Ooi, "Broadband long-wavelength dot-in-well superluminescent diode emitting at 1.6um", Proceeding of SPIE, presented in Photonics West, San Jose, USA, [6124-16] Oral Presentation, 23-17 January, 2006. T. Mei, D. Nie, H.S. Djie, and B.S. Ooi, "Curing quantum dots using argon inductively coupled plasma", NSTI Nanotech 06, Boston, May 7-11, 2006. (Oral presentation, refereed). H.S. Djie, D.-N. Wang, B.S. Ooi, and J.C.M. Hwang, "Quantum-dot Intermixing Enhancement using UV laser irradiation", 18th International Conference on Indium Phosphide and Related Materials, Princeton, 7-11 May 2006 (Oral presentation, refereed). H.S. Djie, Y. Wang, and B.S. Ooi, "Nitrogen Implantation Induced Intermixing in InAs/InAlGaAs/InP Dots-in-Well Laser", 18th International Conference on Indium Phosphide and Related Materials, Princeton, 7-11 May 2006 (poster presentation, refereed).

Year 2005

Peer Reviewed Journal Papers
H.S. Djie, B.S. Ooi, and V. Aimez, "Neutral ion implantation induced selective quantum dot intermixing", Applied Physics Letters, vol. 87, pp261102-261104, 2005. Y. Wang, H.S. Djie, and B.S. Ooi, "Interdiffusion in InGaAsSb/AlGaAsSb quantum wells", Journal of Applied Physics, vol. 98(7), Art. 0735081 (7 pages), 2005. O. Gunawan, H.S. Djie, and B.S. Ooi, "Three-dimensional interdiffusion effect to various shapes of quantum dots", International Journal of Nanoscience, vol. 4 (4), pp683-688, 2005. O. Gunawan, H.S. Djie, and B.S. Ooi, "Electronics states of interdiffused quantum dots", Physical Review B, vol. 71(20), Art. 205319 (10 pages), May 2005. H.S. Djie, C.K.F. Ho, T. Mei, and B.S. Ooi, "Quantum well intermixing enhancement using Ge-doped sol-gel derived SiO2 encapsulant layer in InGaAs/InP laser structure", Applied Physics Letters., vol. 86 (8), pp081106:1-3, Feb 2005.
Conferences and Proceedings (2005)
D.-N. Wang, H.S. Djie, J.C.M. Hwang, B.S. Ooi, X.-M. Fang, Y. Wu, J.M. Fastenau, W.K. Liu, and S.N.G. Chu, "Photoluminescence and transmission electron microscopy of InGaAs/GaAs quantum dots grown by atomic layer epitaxy", Material Research Symposium-Fall Meeting, Boston, Nov 28 - Dec 2, 2005. (Poster Presentation, refereed). H.S. Djie, B.S. Ooi, C.K.F. Ho, T. Mei, K. Pita, and Q.N. Ngo, "Quantum-well intermixing using Ge-doped sol-gel derived SiO2 encapsulant layer", Material Research Symposium-Fall Meeting, Boston, Nov 28 - Dec 2, 2005. (Poster Presentation, refereed). Y. Wang, C.E. Dimas, H.S. Djie, B.S. Ooi, G. Dang, and W. Chang, "Spatial control of bandgap in long wavelength InAs quantum dot-in-well laser structure", Material Research Symposium-Fall Meeting, Proceeding of Symposium EE, Boston, Nov 28 - Dec 2, 2005. (Poster Presentation, refereed). H.S. Djie, C.E. Dimas, and B.S. Ooi, "Reconfigurable semiconductor quantum-dot based wideband emitter for optical sensors", IEEE Sensors 2005, California, 31 Oct- 3 Nov 2005. (Oral Presentation, refereed). H.S. Djie, B.S. Ooi, and V. Aimez, "InGaAs/GaAs quantum dot intermixing using arsenic and phosphorus ion implantation induced disordering", Proceeding of International Conference on Materials for Advance Technologies (ICMAT) 2005 - Symposium M: Photonic Materials and Devices, 3-8 Jul 2005, Singapore. (Oral Presentation, refereed). H.S. Djie, D.-N. Wang, B.S. Ooi, J.C.M. Hwang, X.-M. Fang, Y. Wu, J.M. Fastenau, and W.K. Liu, "Emission wavelength trimming of self-assembled InGaAs/GaAs Quantum Dots with GaAs/AlGaAs superlattices by rapid thermal annealing", Proceeding of International Conference on Materials for Advance Technologies (ICMAT) 2005 - Symposium J: III-V Semiconductors for Microelectronic and Optoelectronic Applications, 3-8 Jul 2005, Singapore. (Oral Presentation, refereed). C.E. Dimas, H.S. Djie, and B.S. Ooi, "Superluminescent diodes using quantum dots superlattice", Proceeding of International Conference on Materials for Advance Technologies (ICMAT) 2005 - Symposium M: Photonic Materials and Devices, 3-8 Jul 2005, Singapore. (Oral Presentation, refereed). Y. Wang, H.S. Djie, B.S. Ooi, P. Dowd, P. Rotalla, V. Aimez, Y. Cao, S.R. Johnson, and Y.-H. Zhang, "Interdiffusion effect on quantum well structures grown on GaSb substrate", in Proc. ICMAT & IUMRS-ICAM 2005- Symposium J: III-V Semiconductors for Microelectronic and Optoelectronic Applications, 3-8 Jul 2005, Singapore. (Oral Presentation, refereed). Y. Huang, Y. Xiao, G. Xu, S.T. Ho, Y. Zhao, C. Luo, J. Wang, and B.S. Ooi, "Design and fabrication of a micro-cavity laser with transparent micro loop mirror", Optical Fiber Communication (OFC) 2005, California (USA), March 2005. (Poster presentation, refereed). Y. Huang, B. Liu, S.T. Ho, G. Xu, and B.S. Ooi, "Quantum well saturation in ultra short absorptive waveguide section formed by quantum well intermixing", The Conference on Lasers and Electro-Optics/International Quantum Electronics Conference (CLEO/QELS) 2005,Anaheim (USA), May 2005 (Oral presentation, refereed). (Invited paper) B.S. Ooi, H.S. Djie, and C.E. Dimas, "Interdiffused quantum nanostructure for photonics integration", in Proc. SPIE Int. Soc. Opt. Eng., vol. 6013, pp. 601304, 2005. (in SPIE Optics East 2005 - Optoelectronic Devices: Physics, Fabrication, and Application II, 23-26 Oct 2005, Boston, USA).

Year 2004

Peer Reviewed Journal Papers
B.S. Ooi, T.K. Ong, and O. Gunawan, "Multiple-wavelength integration of InGaAs/InGaAsP structures using pulsed laser irradiation induced quantum well intermixing", IEEE Journal of Quantum Electronics, vol. 40(5), pp481-490, 2004.
Conferences and Proceedings (2004)
O. Gunawan, H.S. Djie, and B.S. Ooi, "Intermixing of quantum-dot heterostructures", presented at the 1st Int. Conf. on Nanotechnology, 13-17 Jul 2004, Singapore. (Oral presentation, refereed). O. Gunawan, T.K. Ong, and B.S. Ooi, "Direct writing of multiple-wavelength chip in InGaAs-InGaAsP structure using pulsed laser irradiation", Proceeding of SPIE, SPIE Optics East 2004, Philadelphia (USA), Nov 2004. (Poster Presentation, refereed). (Invited paper) R. Wang, Y. Shi, and B.S. Ooi, "Intermixing of InGaAs-InGaAsP lattice-matched and strained quantum well structures using pre-annealing enhanced defects diffusion technique", Proceeding of SPIE, Photonic Asia 04, Beijing (China), November 2004. (refereed). (Invited paper) B.S. Ooi, "Monolithic multiple wavelength integration using quantum well intermixing", 206th Meeting of The Electrochemical Society, Honolulu (Hawaii), Oct 3-8, 2004. (refereed).

Year 2003

S.L. Ng, H.S. Djie, H.S. Lim, Y.L. Lam, Y.C. Chan, P. Down, B.S. Ooi, V. Aimez, J. Beauvais, and J. Beerens, "Impact of quantum well intermixing on polarization anisotropy of InGaAs/InGaAsP quantum well modulators", Journal of Vacuum Science of Technology B, 21(4), pp1482-1486, 2003. S.L Ng, H.S. Djie, H.S. Lim, Y.L. Lam, Y.C. Chan, B.S. Ooi, V. Aimez, J. Beauvais, and J. Beerens, "Wide Optical Bandwidth Electro-Absorption Waveguide Modulator Arrays", Journal of Optics Communications, vol. 226 (1-6), pp. 191-197, 2003.

Year 2002

S.L. Ng, H.S. Lim, Y.L. Lam, Y.C. Chan, B.S. Ooi, V. Aimez, J. Beauvais, and J. Beerens, "Generation of multiple energy bandgaps using a gray mask process and quantum well intermixing", Jpn, J. Appl. Phys. Vol. 41, part1, No.2B, p.1080-1084, 2002. H.S. Lim, V. Aimez, B.S. Ooi, J. Beauvais, and J. Beerens, "A novel fabrication technique for multiple-wavelength photonic-integrated devices in InGaAs-InGaAsP laser heterostructures", IEEE Photonics Technology Letters, Volume: 14 Issue: 5, May 2002, Page(s): 594 -596. S.L. Ng, H.S. Lim, Y.L. Lam, Y.C. Chan, B.S. Ooi, V. Aimez, J. Beauvais, and J. Beerens, "Polarisation insensitive InGaAs/InGaAsP electro-absorption intensity modulator using quantum well intermixing process", Electronics Letters, Volume: 38 Issue: 5, 28 Feb. 2002 Page(s): 241 -242. V. Aimez, J. Beauvais, J. Beerens, D. Morris, H.S. Lim, and B.S. Ooi, "Low-energy ion-implantation induced quantum well intermixing", IEEE Journal on Selected Topics in Quantum Electronics, Vol.8, N0.4, 2002. S.L. Ng, H.S. Lim, Y.L. Lam, Y.C. Chan, B.S. Ooi, V. Aimez, J. Neauvais, and J. Beerens, "Multiple-wavelength operation of electroabsorption intensity modulator array fabricated using the one-step quantum well intermixing process", Applied Physics Letters, Vol. 81, No.11, pp1958-1960, 2002. Y. Chen, C.L. Tan, B.S. Ooi, K. Radhakrishnan, and G.I. Ng, "Through wafer via hole by reactive ion etching of GaAs", Proc. SPIE Int. Soc. Opt. Eng. 4652, 120 (2002).

Year 2001

V. Aimez, J. Beauvais, J. Beerens, S.L. Ng, and B.S. Ooi, "Monolithic intracavity laser-modulator device fabrication using postgrowth processing of 1.55um heterostructures", Appl. Phys. Lett., Vol. 79, No. 22, pp3582-4, 2001. T.K. Ong, Y.C. Chan, Y.L. Lam, and B.S. Ooi, "Wavelength tuning in InGaAs/InGaAsP quantum well lasers using pulsed photoabsorption induced disordering", Appl. Phys. Lett., Vol. 78, No. 18, pp2637-2639, 2001. B.S. Ooi, S.L. Ng, Y.L. Lam, and Y.C. Chan, "Fabrication of band-gap tuned lasers in GaAs/AlGaAs structure using one-step rapid thermal process", J. Optical Communication, vol.22 (5), 2001. V. Aimez, J. Beauvais, J. Beerens, H.S. Lim, and B.S. Ooi, "Wideband integrated multiple laser chip on 1.55 um heterostructure using controlled bandgap tuning by quantum well intermixing", paper CTuV3, Conference on Lasers and Electro-Optics 2001 (CLEO '01), USA, May 2001. S.L. Ng, B.S. Ooi, Y.L. Lam, and Y.C. Chan, "One-step rapid thermal process for bandgap tuned lasers in GaAs/AlGaAs structure", 4th Pacific Rim Conference on Lasers and Electro-Optics(CLEO/PR2001), Nippon Convention Center, Makuhari Messe, Chiba, Japan on July 15-19, 2001. T.K. Ong, Y.C. Chan, and B.S. Ooi, "Fabrication of multiple-wavelength lasers in InGaAs/InGaAsP structures using direct laser writing", 4th Pacific Rim Conference on Lasers and Electro-Optics(CLEO/PR2001), Nippon Convention Center, Makuhari Messe, Chiba, Japan on July 15-19, 2001. paper No. 1150. S.L. Ng, H.S. Djie, H.S. Lim, B.S. Ooi, Y.L. Lam, Y.C. Chan, P. Dowd, V. Aimez, J. Beauvais, and J. Beerens, "Polarisation-dependent performance of Multiple wavelength electro-absorption intensity modulator arrays on a single InGaAs/InGaAsP chip", ME 4, 14th IEEE/LEOS Annual Meeting, San Diego, 12-15 November 2001. O. Gunawan, H.S. Djie, B.S. Ooi, and Y.L. Lam, "Electronic structure of interdiffused quantum dots", ICMAT 2001, Singapore, paper L7-05. S.L. Ng, H.S. Lim, Y.L. Lam, Y.C. Chan, B.S. Ooi, V. Aimez, J. Beauvais, and J. Beerens, "A low cost solution in generating multiple-bandgap for 1.55 mm optical fiber communication", WCC4, 14th IEEE/LEOS Annual Meeting, San Diego, 12-15 November 2001. H.S. Lim, Y.L. Lam, Y.C. Chan, B.S. Ooi, V. Aimez, J. Beauvais, and J. Beerens, "A one-step technique in fabricating InGaAs-InGaAsP monolithic multiple-wavelength laser arrays", 27th European Conference on Optical Communication, September 30th - October 4th 2001, Amsterdam. T.K. Ong, Y.C. Chan, and B.S. Ooi, "Fabrication of multiple-wavelength lasers in InGaAs-InGaAsP structures using direct laser writing", IEEE Photonics Technology Letters, Volume: 13 Issue: 11, Nov. 2001 Page(s): 1161 -1163.

Year 2000

S. Buddhudu, C.H. Kam, S.L. Ng, Y.L. Lam, Y. Zhou, B.S. Ooi, K.S. Wong, and U. Rambabu, "Green Color Luminescence in Tb3+:(La,Ln)PO4 (Ln=Gd or Y) Photonic Materials", Material Science and Engineering B, 72(1), pp 27-30, 2000. Y.W. Chen, B.S. Ooi, and G.I. Ng, "Electron cyclotron resonance etching of GaAs vias for monolithic microwave integrated circuits", Journal of Optical Materials, vol 14/3,pp. 223-227, 2000. Y.W. Chen, B.S. Ooi, G.I. Ng, and C.L. Tan, "High rate electron cyclotron resonance etching of GaAs via hole", Materials Science and Engineering B, vol 74/1-3, pp. 282-285, 2000. Y.W. Chen, B.S. Ooi, G.I. Ng, and C.L. Tan, "Electron cyclotron resonance plasma etching of InP through-wafer connections at > 4 m/min using Cl2/Ar", Vacuum Science & Technology B, vol.18(4), pp.1903-1905, 2000. Y.W. Chen, B.S. Ooi, G.I. Ng, K. Radhakrishnan, and C.L. Tan, "Dry via hole etching of GaAs using high density Cl2/Ar plasma", J. Vac. Sci. Technol. B, vol. 18(5), pp2509-2512, 2000. O. Gunawan, T.K. Ong, B.S. Ooi, Y.L. Lam, and Y.C. Chan, "A theoretical analysis of quantum well intermixing using pulsed laser irradiation technique in GaInAs/GaInAsP laser structure", Surface and Coatings Technology, vol 130, pp.116-121, 2000. H.J. Jiang, Y. Zhou, B.S. Ooi, Y.W. Chen, Terence Wee, and Y.L. Lam, "Improvement of organic light-emitting diodes performance by the insertion of a Si3N4 layer", Thin Solid Films, vol 363, Issue 1-2, pp. 25-28, Feb 2000. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, B.S. Ooi, G. Tan, and J. Yao, "Embossed bragg gratings based on organically modified silane waveguides on InP", Applied Optics., vol 39, No 27, pp4942-4945, 2000. S.L. Ng, B.S. Ooi, Y.L. Lam, Y.C. Chan, and Y. Zhou, "Characterization of rapid thermal oxidation of AlAs on GaAs/AlGaAs structure", Surface and Interface Analysis, vol. 29, pp 33-37, 2000. S.L. Ng, Y.L. Lam, Y. Zhou, B.S. Ooi, C.H. Kam, K.S. Wong, U. Rambabu, and S. Buddhudu, "Green color emission from Tb3+:LnPO4(Ln=La,Gd or Y) phosphors for photonic applications", Journal of Materials Science Letters, vol 19, pp.495-497, 2000. T.K. Ong, B.S. Ooi, Y.L. Lam, Y.C. Chan, Y. Zhou, A. Saher Helmy, and J.H. Marsh, "High spatial resolution quantum well intermixing process in GaInAs/GaInAsP laser structure using pulsed photoabsorption induced disordering", J. Appl. Physics, vol.87, pp. 2775-2779, 2000. T.K. Ong, B.S. Ooi, Y.L. Lam, and Y.C. Chan, "Pulsed laser irradiation quantum well intermixing process in GaInAs/GaInAsP laser structures", Microelectronics Engineering, vol 51, Issue 52, pp.349-355, 2000. Q. Xiang, Y. Zhou, Y.L. Lam, Y.C. Chan, C.H. Kam, B.S. Ooi, H.X. Zhang, and S. Buddhudu, "Up-conversion emission in violet from yellow in Nd-doped SiO2-TiO2-Al2O3 sol-gel glasses", Materials Research Bulletin, Vol.35, No.9, pp.1571-1578, 2000. S.L. Ng, Y.L. Lam, B.S. Ooi, Y. Zhou, Y.C. Chan, C.H. Kam, K.S. Wong, and S. Buddhudu, "Luminescence of Tb3+:LnPO4 photonic materials", EEE Research Bulletin, NTU Jan.2000, pp.12-13. S. Buddhudu, H.X. Zhang, C.H. Kam, S.L. Ng, B.S. Ooi, Y.L. Lam, Y.C. Chan, Y. Zhou, W.X. Que, and K.S. Wong, "Green and red luminescence in Tb3+ and Eu3+:Zn2SiO4 powders", Photonics West 2000, 22 to 28 January 2000, San Jose, California, USA. Q. Xiang, Y. Zhou, B.S. Ooi, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Fluorescence lifetime study on sol-gel derived Er3+-doped SiO2-TiO2-Al2O3 planar waveguides", Photonics West 2000, SPIE V3942, 23-28 January 2000, San Jose, CA, USA. Q. Xiang, Y. Zhou, B.S. Ooi, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Processing and optical properties of Nd3+-doped SiO2-TiO2-Al2O3 planar waveguides", Photonics West 2000, SPIE V.3943, 23-28 January 2000, San Jose, CA, USA. Q. Xiang, Y. Zhou, Y.L. Lam, Y.C. Chan, C.H. Kam, and B.S. Ooi, "Er3+/Yb3+ planar waveguides derived from the sol-gel route for integrated optical applications", CLEO 2000, 7-12 May 2000, San Francisco, CA, USA. Y.W. Chen, B.S. Ooi, G.I. Ng, and C.L. Tan, "Parametric study of InP backside processing using high density plasma etching", Twelfth International Conference on Indium Phosphide and Related Materials (IPRM-2000), paper MP1.25, May 14-18, 2000, Williamsburg, Virginia, USA. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, B.S. Ooi, J. Yao, and Z.S. Yun, "Development of micro-patterned glass waveguide gratings on III-V compounds for integrated applications", CTuB, CLEO, May 2000, San Francisco, California. S.L. Ng, B.S. Ooi, Y.L. Lam, Y. Zhou, Y.C. Chan, V. Aimez, J. Beauvais, and J. Beerens, "Multiple-channel InGaAs/InGaAsP electro-absorption intensity modulator fabricated using low energy phosphorus ion implantation induced intermixing", Int'l Conf. on Applied Photonic Technologies 2000, LN.5.1.20., 12-16 June 2000, Quebec City, Canada, SPIE Proceedings Vol. 4087, p. 490-494. Y.W. Chen, S.L. Ng, B.S. Ooi, G.I. Ng, and C.L. Tan, "Study of electron cyclotron resonance dry plasma etching of InP using Cl2/Ar chemistry", the Sixth International Conference of Materials Science in Asia (IUMRS-ICA 2000), July 24-26, 2000, Hong Kong. S.L. Ng, H.S. Lim, B.S. Ooi, Y.L. Lam, Y. Zhou, Y.C. Chan, V. Aimez, J. Beauvais, and J. Beerens, "Monolithic InGaAs/InGaAsP electro-absorption intensity modulator fabricated using low energy arsenic ion implantation induced intermixing", 2000 IEEE/LEOS Summer Tropical Meetings 2000, 24-28 July 2000, MA1.0004, Florida, U.S.A. S.L. Ng, Y.W. Chen, C.L. Wee, B.S. Ooi, Y.L. Lam, Y.C. Chan, and Y. Zhou, "Intermixing in InGaAs/InGaAsP multiple quantum well structures using argon plasma exposure", Int'l Union of Mat. Res. Societies - 6th Int'l Conference in Asia 2000 (IUMRS-ICA), symposium B, 24-26 July 2000, Hong Kong. T.K. Ong, B.S. Ooi, Y.L. Lam, Y.C. Chan, and Y. Zhou, "Pulsed-laser-induced quantum well intermixing in GaInAs/GaInAsP laser structures", Cleo-Europe 2000 conference, paper CWF96, 10-15 September 2000, Nice Acropolis, France. T.C.L. Wee, B.S. Ooi, T.K. Ong, Y.L. Lam, Y.C. Chan, and G.I. Ng, "Novel Quantum Well Intermixing in InGaAs-InGaAsP Laser Structure Using Argon Plasma Exposure", Cleo-Europe 2000 conference, paper CWF95, 10-15 September 2000, Nice Acropolis, France. V. Aimez, J. Beauvais, J. Beerens, H.S. Lim, S.L. Ng, and B.S. Ooi, "Post-growth processing of 1.55 m InP/InGaAs/InGaAsP material for integrated laser-modulator devoice fabrication", OSA Integrated Photonics Research Conference, Active and Compound Semiconductor Devices, Quebec 12-15 July 2000, IPR Technical Digest IthG4-1, p135-137. Y.L. Lam, Y.C. Chan, V. Aimez, J. Beauvais, B.S. Ooi, J. Beerens, Y. Zhou, and S.L. Ng, "Multiple-channel InGaAs/InGaAsP electro-absorption intensity modulator fabricated using low energy phosphorus ion implantation", International Conference on Applications of Photonic Technology, Quebec, 12-16 June 2000. V. Aimez, J. Beauvais, J. Beerens, H.S. Lim, S.L. Ng, and B.S. Ooi, "High quality photonic device fabricated using low energy ion implantation induced intermixing", International Conference on Applications of Photonic Technology, Quebec, 12-16 June 2000, SPIE Proceedings Vol. 4087, p616-623. V. Aimez, J. Beauvais, J. Beerens, and B.S. Ooi, "High precision metal masking for multiple wavelength laser diode fabricated using single step ion implantation induced quantum well intermixing", International Conference on Applications of Photonic Technology, Quebec, 12-16 June 2000, SPIE Proceedings Vol. 4087, p607-615. T.K. Ong, Y.W. Chen, B.S. Ooi, Y.L. Lam, and Y.C. Chan, "Pulsed laser irradiation quantum well intermixing process in GaInAs/GaInAsP laser structures", Proceedings of the 3rd International Conference on Low Dimension Structures & Devices, p.349-355, 2000.

Year 1999

Q. Xiang, Y. Zhou, B.S. Ooi, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Optical properties of Er-doped SiO2-GeO2-Al2O3 planar waveguide fabricated by sol-gel process", Thin Solid Films, 1999. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, W.X. Qwe, and B.S. Ooi, "Fabrication of sol-gel derived optical waveguide on InP for hybridized applications", Applied Physics A (Online publication, September), vol. 69(6), pp. 649-651, 1999. O. Gunawan, L.H. Lee, B.S. Ooi, T.C. Au Yeung, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Electronic structure and optical properties of sol-gel SiO2 intermixed GaAs-AlGaAs quantum well structures", Electrical & Electronic Engineering Research Review, School of Electrical and Electronic Engineering, Nanyang Technological University, Jan. 1999, p11-12. O. Gunawan, L.H. Lee, B.S. Ooi, T.C. Au Yeung, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Electronic structure and optical properties of Sol-Gel SiO2 intermixed GaAs-AlGaAs quantum well structures", 9th MINDEF-NTU Joint R&D Seminar, January 1999. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, and B.S. Ooi, "Preparation of SiO2 layers on InP substrate by sol-gel technique for integrated optics", Photonics West '99, (3632-30)S5, 23 - 29 January 1999, San Jose, California, USA. O. Gunawan, T.K. Ong, B.S. Ooi, Y.L. Lam, and Y.C. Chan, "A theoretical analysis of quantum well intermixing using pulsed laser irradiation technique in GaInAs/GaInAsP laser structure", The fifth IUMRS International Conference on Advanced Materials, Beijing, China, Paper X88, June 13 - June 18 1999. Y.W. Chen, B.S. Ooi, G.I. Ng, and Y.C. Chan, "Electron cyclotron resonance etching of GaAs Vias for monolithic microwave integrated circuits", Fifth IUMRS International Conference on Advanced Materials (IUMRS-ICAM'99), June 13-18, 1999, Beijing, China. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, and B.S. Ooi, "Experimental comparison of sol-gel derived inorganic and organic modified silica films on InP", SPIE's 44th Annual Meeting, 18-23 July 1999, Denver, USA. Conference of Materials and Devices for Photonics Circuits, No.3803-14. T.K. Ong, B.S. Ooi, Y.L. Lam, Y.C. Chan, and M.K. Rao, "High spatial resolution quantum well intermixing process in GaInAs/GaInAsP laser structures", 3rd Pacific Rim conference on lasers and electro-optics, (CLEO/Pacific Rim'99), Seoul, Korea, 30 Aug.- 3 Sept. 1999. O. Gunawan, S.L. Ng, C.H. Ooi, B.S. Ooi, Y.L. Lam, and Y.C. Chan, "Fabrication of nanostructures using electron beam interference technique - a proposal", oral presentation CLEO/Pacific RIM'99, 4 Sept 1999. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, W.X. Que, and B.S. Ooi, "Fabrication of sol-gel derived glass waveguide on Indium Phosphide based materials for integrated optics", oral presentation, CLEO 99, CThW1. Q. Xiang, Y. Zhou, Y.L. Lam, Y.C. Chan, C.H. Kam, B.S. Ooi, and H.X. Zhang, "Preparation and fluorescence properties of sol-gel derived Er-doped SiO2-GeO2-Al2O3 planar optical waveguides", oral presentation by CLEO/Pacific Rim'99, September, 1999, South Korea. H.S. Lim, B.S. Ooi, Y.L. Lam, Y.C. Chan, V. Aimez, J. Beauvais, and J. Beerens, "Photonic integration of InGaAs-InGaAsP laser using low energy arsenic implantation induced disordering for quantum well intermixing", CLEO/Pacific '99, 30 August - 3 September 1999, Seoul, Korea, IEEE Proceeding P. 1030-1031. Y.W. Chen, B.S. Ooi, G.I. Ng, and C.L. Tan, "High rate etching of GaAs via connections using Cl2/Ar plasma", 8th International Symposium on Integrated Circuits, Devices & Systems (ISIC-99), pp.109-111, September 8-10, 1999, Singapore. T.K. Ong, B.S. Ooi, Y.L. Lam, and Y.C. Chan, "Pulsed laser irradiation quantum well intermixing process in GaInAs/GaInAsP laser structures", 3rd international conference on low dimensional structures and devices, Antalya, Turkey, 15-17 Sept. 1999. Y.W. Chen, B.S. Ooi, G.I. Ng, and Y.C. Chan, "High rate electron cyclotron resonance etching of GaAs via hole", 3rd International Conference on Low Dimensional Structures and Devices (LDSD'99), September 15-17, 1999, Antalya, Turkey. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, J. Yao, and B.S. Ooi, "Theoretical and experimental study of polarization dependent loss of passive devices for optical fiber communication", Photonics East'99, paper 3847-15, SPIE conference, Optical Devices for Fiber Communication, 19-22 September 1999, Boston, USA, oral presentation. Y.W. Chen, B.S. Ooi, G.I. Ng, and Y.C. Chan, "Dry plasma etching of GaAs vias using BCl3/Ar and Cl2/Ar plasmas", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.199-206. O. Gunawan, W.H. Lui, B.S. Ooi, Y.C. Chan, Y.L. Lam, and Y. Zhou, "Development of a laser holographic interference lithography system", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.515-522. H.J. Jiang, Y. Zhou, B.S. Ooi, and Y.L. Lam, "Polymer light-emitting diodes based on novel soluble poly(p-phenylene vinylene)", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.231-236. L.H. Lee, B.S. Ooi, Y. Zhou, Y.C. Chan, and Y.L. Lam, "Fabrication of bandgap tuned lasers in GaAs/AlGaAs structure using sol-gel SiO2 induced quantum well intermixing", Proceedings of SPIE, Photonics Technology into the 21st Century: Semiconductors, Microstructures, and Nanostructures, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3899, pp.162-167. H.S. Lim, B.S. Ooi, Y.L. Lam, Y.C. Chan, Y. Zhou, V. Aimez, J. Beauvais, and J. Beerens, "Photonic integration of InGaAs-InGaAsP laser using low-energy implantation induced quantum well intermixing", Proceedings of SPIE, Photonics Technology into the 21st Century: Semiconductors, Microstructures, and Nanostructures, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3899, pp.168-175. H.S. Lim, B.S. Ooi, Y.L. Lam, Y.C. Chan, and Y. Zhou, "Effect of etch pit density of InP-substrate on the stability of InGaAs/InGaAsP quantum well laser materials", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.207-212. J. Liu, Y.L. Lam, Y.C. Chan, Y. Zhou, W.X. Que, G. Tan, and B.S. Ooi, "Deposition of sol-gel derived inorganic and composite material films on InP for integrated optics", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.417-424. S. Ng, O. Gunawan, B.S. Ooi, Y.L. Lam, Y.C. Chan, and Y. Zhou, "Quantum well intermixing of GaAs/AlGaAs laser structure using one-step rapid thermal oxidation of AlAs", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.184-190. C. Wang, Y. Chan, Y. Lam, and B. Ooi, "Development of micro-lens arrays for integration with optoelectronic devices", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.265-272. T.C.L. Wee, B.S. Ooi, Y. Zhou, Y.C. Chan, and Y.L. Lam, "Characterization of reactive ion etching of sol-gel derived SiO2 using Taguchi optimization method", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.438-444. H.X. Zhang, Y. Zhou, C.H. Kam, Y.L. Lam, B.S. Ooi, and Y.C. Chan, "Deposition of potassium lithium niobate films by sol-gel method", Proceedings of SPIE, Design, Fabrication, and Characterization of Photonic Devices, International Symposium on Photonics and Applications, Nov 1999, Singapore, Vol. 3896, pp.425-432. S.L. Ng, T.C.L Wee, B.S. Ooi, Y.L. Lam, Y.C. Chan, Y. Zhou, and S. Buddhudu, "Oxidation of aluminum-arsenide on GaAs/AlGaAs double quantum well laser structure using rapid thermal processor", International Conference on Laser Materials and Devices'99, New Delhi, India. H.X. Zhang, S.L. Ng, T.C.L Wee, B.S. Ooi, Y.L. Lam, C.H. Kam, Y.C. Chan, Y. Zhou, W.X. Que, and S. Buddhudu, "Green up-conversion emission in Er3+:BaTiO4 sol-gel powder", International Conference on Laser Materials and Devices'99, New Delhi, India., Dec 1999. Q. Xiang, Y. Zhou, B.S. Ooi, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Fabrication of ridge waveguides from sol-gel derived Nd-doped SiO2-TiO2-Al2O3 glass films", LEOS'99, IEEE, USA. V. Aimez, J. Beauvais, J. Beerens, H.S. Lim, S.L. Ng, and B.S. Ooi, "Characterization of high quality photonic devices using Raman spectroscopy", Condensed Matter and Material Physics Conference (Leicester UK, December 1999). V. Aimez, J. Beauvais, J. Beerens, H.S. Lim, and B.S. Ooi, "Multilayer masking technique for graded intermixing induced by low energy ion implantation", 9th Canadian Semiconductor Technology Conference, Ottawa, Canada, August 10-13 1999.

Year 1998

B.C. Qiu, B.S. Ooi, A.C. Bryce, S.E. Hicks, C.D.W. Wilkinson, R.M. DeLaRue, and J.H. Marsh, "Reduced damage reactive ion etching process for the fabrication of InGaAsP/InGaAs multiple quantum well ridge waveguide lasers", Journal of Vacuum Science and Technology B, Microelectronics Processing & Phenomena, Vol. 16, No. 4, pp1818-1823, 1998. B.S. Ooi, A. Saher Helmey, Y.S. Tang, A.C. Bryce, J.H. Marsh, and J. Beauvious, "Optical characterisation of quantum well wires using arsenic implantation induced intermixing in GaAs/AlGaAs structures", Journal of Applied Physics., Vol. 83, No. 8, pp4526-4530, 1998. B.S. Ooi, A. Saher Helmey, Y.S. Tang, A.C. Bryce, J.H. Marsh, and J. Beauvious, "Quantum well wires using arsenic implantation induced intermixing in GaAs/AlGaAs structures", Technical Digest of Conference on Laser and Electro-Optics-Europe (CLEO Europe)'98, paper CThK5, p335, 1998. A. Saher Helmy, B.S. Ooi, F. Camacho, A.C. Bryce, J.S. Aitchison, R.M. De La Rue, and J.H. Marsh, "Mach-Zehnder modulators monolithically integrated with Fabry-Perot laser diodes in GaAs/AlGaAs using impurity-free vacancy disordering", Technical Digest of Conference on Laser and Electro-Optics-Europe (CLEO Europe)'98., paper CME5, p19, 1998. L.H. Lee, B.S. Ooi, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Quantum well intermixing in GaAs-AlGaAs lasers structure using sol-gel SiO2 dielectric cap", Proceeding of SPIE (Semiconductor Lasers III), Vol 3547, pp319-323, 1998. L.H. Lee, B.S. Ooi, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Study Of Propagation Losses In GaAs/AlGaAs Single Mode Ridge Waveguides Fabricated Using Impurity Free Vacancy Disordering", Proceeding of 4th National Symposium On Progress in Materials Research, pp187-189, 27th March 1998. K.N. Srijith, V. Ranjit, B.S. Ooi, Y.C. Chan, Y.L. Lam, and C.H. Kam, "Fabrication and Characterisation of Bandgap Tuned Lasers In GaAs/AlGaAs Quantum Well Structures Using Pulsed Laser Irradiation", Proceeding of 4th National Symposium On Progress in Materials Research, (Best Postal Award), pp137-139, 27th March 1998. Y.K. Lin, D.W.L. Leong, B.S. Ooi, Y.C. Chan, and Y.L. Lam, "Low Temperature (77 K) Photoluminescence Measurement Using 1x2 Optical Fibre Coupler technique", Proceeding of 4th National Symposium On Progress in Materials Research, pp30-32, 27th March 1998. V. Ranjit, K.N. Srijith, B.S. Ooi, Y.C. Chan, Y.L. Lam, and C.H. Kam, "Characterisation of GaAs/AlGaAs Extended Cavity lasers fabricated using dielectric cap induced quantum well intermixing", Proceeding of 4th National Symposium On Progress in Materials Research, pp133-136, 27th March 1998. O. Gunawan, B.S. Ooi, Y.L. Lam, Y.C. Chan, and C.H. Kam, "Characterisation of bandgap tuned lasers fabricated using sol-gel SiO2 induced quantum well intermixing", invited paper, 1st MRS (Singapore) Symposium, National University of Singapore, 1998. O. Gunawan, B.S. Ooi, Y.C. Chan, and Y.L. Lam, "Characterisation of GaAs-AlGaAs external cavity lasers fabricated using dielectric cap induced quantum well intermixing", The Inaugural Symposium of the Materials Research Society Singapore, Nov 1998.

Year 1997

B.S. Ooi, A.C. Bryce, J.H. Marsh, and J.S. Roberts, "Effect of p and n-doping on neutral impurity and SiO2 dielectric cap induced quantum well intermixing in GaAs/AlGaAs structures", Semiconductor Sciences and Technology, Vol. 12, pp121-127, 1997. P. Cosumano, B.S. Ooi, A. Saher Helmy, S.G. Ayling, A.C. Bryce, J.H. Marsh, B. Vogette, and A.J. Rose, "Suppression of quantum well intermixing in GaAs/AlGaAs laser structures using phosphorous-doped SiO2 encapsulant layer", Journal of Applied Physics, Vol. 81, pp2445-2447, 1997. B.S. Ooi, C.J. Hamilton, K. McIlvaney, A.C. Bryce, R.M. DeLaRue, J.H. Marsh, and J.S. Roberts, "Quantum well intermixing of GaAs/AlGaAs structures using pulsed laser irradiation", IEEE Photonic Technology Letters, Vol. 9 No. 5, pp587-589, 1997. B.S. Ooi, K. McIlvaney, M.W. Street, A. Saher Helmy, S.G. Ayling, A.C. Bryce, J.H. Marsh, and J.S. Roberts, "Selective quantum well intermixing in GaAs/AlGaAs using impurity free vacancy induced disordering", IEEE Journal of Quantum Electronics, Vol. 33, No. 10, pp1784-1793, 1997. A. Saher Helmey, B.S. Ooi, A.C. Bryce, J.S. Atchison, R.M. De La Rue, and J.H. Marsh, "Mach-Zehnder modulators in GaAs/AlGaAs double quantum well structures: A regrowth-free approach for monolithic integration", Proceeding. Semiconductor Integrated OptoElectronics 97, pp133-136, 1997. A. Saher Helmey, B.S. Ooi, F. Camacho, A.C. Bryce, J.S. Atchison, R.M. De La Rue, and J.H. Marsh, "Mach-Zehnder modulators in GaAs/AlGaAs double quantum well structures: A regrowth-free approach for monolithic integration", IEE Proceeding of Optoelectronics Integration and Switching, Vol. 372, pp 13.40, 1997. B.C. Qiu, B.S. Ooi, A.C. Bryce, S.E. Hicks, C.D.W. Wilkinson, R.M. De La Rue, and J.H. Marsh, "Low damage reactive ion etching process for fabrication of ridge waveguide lasers", Conference Proceedings, 9th International Conference on Indium Phosphide and Related Material, Vol. 9, 1997. B.S. Ooi, T.C. Au Yueng, A.T.S. Ho, Y.C. Chan, Y.L. Lam, and C.H. Kam, "Quantum well intermixing of InGaAs/InGaAsP structures using pulsed laser irradiation", Proceeding of Progress in Materials R&D, Poster Conference in Conjunction With IMRE Launching, p71, 1997. B.S. Ooi, Y.L. Lam, Y.C. Chan, Y. Zhou, and C.H. Kam, "Modification of Optical Properties of GaAs/AlGaAs Quantum Well Structure Using Dielectric Cap Induced Disordering", Proceeding of Progress in Materials R&D, Poster Conference in Conjunction With IMRE Launching, p70, 1997.

Year 1996

B.S. Ooi, S.G. Ayling, A.C. Bryce, and J.H. Marsh, "Fabrication of multiple wavelength lasers in GaAs/AlGaAs structures using a one-step spatially controlled quantum well intermixing technique", IEEE Photonic Technology Letters, Vol. 7, No. 9, pp944-946, 1996. B.S. Ooi, M.W. Street, S.G. Ayling, A.C. Bryce, J.H. Marsh, and J.S. Roberts, "The application of the selective intermixing in selected area (SISA) technique to the fabrication of photonic devices in GaAs/AlGaAs structures", International Journal of Optoelectronics, Vol. 10, No. 4, pp257-264, 1996. B.S. Ooi, E.L. Portnoi, C.J. McLean, A. McKee, A.C. Bryce, R.M. De La Rue, and J.H. Marsh, "Direct writing of gratings in GaInAs/GaInAsP quantum well using pulsed laser irradiation", IPRM'96 Conference Proceedings, 8th International Conference on Indium Phosphide and Related Material. Vol. 8, pp252-255, 1996. A. Saher Helmy, B.S. Ooi, and J.H. Marsh, "Investigation of the resolution limit of the hydrogen plasma induced defect layer intermixing process", Integrated Photonics Research, OSA Technical Digest Series, Vol. 6, pp228-231, 1996. A.C. Bryce, R.M. De La Rue, J.M. Marsh, and B.S. Ooi, "Quantum well intermixing in GaInAs/GaInAsP and GaAs/AlGaAs structures using pulsed laser irradiation", Material Research Society Symposia Proceedings, Vol. 450, p413-418, 1996. P. Cusumano, A. Saher Helmey, B.S. Ooi, R.M. De La Rue, A.C. Bryce, and J.H. Marsh, "Impurity free vacancy disordering using phosphorus doped SiO2 and pure SiO2 caps", Material Research Society Symposia Proceedings, Vol. 450, p419-424, 1996. B.S. Ooi, "Using the SISA process to realise bandgap tuned lasers, broadband LEDs and waveguide demultiplexers", paper presented at Optoelectronics Consortium Meeting, University of Wales College of Cardiff (UK), 5 January 1996. B.S. Ooi, E.L. Portnoi, A.C. Bryce, R.M. De La Rue, and J.H. Marsh, "Direct writing of gratings in GaInAs/GaInAsP quantum well using pulsed laser irradiation", Engineering and Physical Science Research Council (EPSRC), Newsletter III-V Semiconductor Facility (UK), Issue 3, pp3-4, 1996. A.C. Bryce, P. Cusumano, A. Saher Helmy, J.H. Marsh, and B.S. Ooi, "Impurity free vacancy disordering using phosphorous dope SiO2 and pure SiO2 caps", Materials Research Society, paper 05.7, Infrared Applications of Semiconductors - Materials, Processing, and Devices, Symposium O, 2-5 December 1996.

Year 1995

B.S. Ooi, S.E. Hicks, A.C. Bryce, C.D.W. Wilkinson, and J.H. Marsh, "Study of C2F6 overetch induced damage and the effects of overetch on subsequent SiCl4 etch of GaAs/AlGaAs", Journal of Applied Physics, Vol. 7, No. 10, pp4961-4969, 1995. B.S. Ooi, A.C. Bryce, and J.H. Marsh, "Integration process for photonic integrated circuits using plasma damage induced layer intermixing", Electronics Letters, Vol. 31, No. 6, pp449-451, 1995. J.H. Marsh, P. Cusumano, A.C. Bryce, B.S. Ooi, and S.G. Ayling, "GaAs/AlGaAs photonic integrated circuits fabricated using impurity-free vacancy disordering", Proceeding of The Society of Photo-Optical Instrumentation Engineering (SPIE), invited paper, Vol. 2401, pp74-86, 1995. B.S. Ooi, S.G. Ayling, A.C. Bryce, and J.H. Marsh, "Multiple wavelength laser chip fabricated using spatially control quantum well intermixing", Technical Digest of Conference on Laser and Electro-Optics (CLEO), Vol. 15, pp152-153, 1995. B.S. Ooi, A.C. Bryce, and J.H. Marsh, "Plasma-based integration process for photonic integrated circuits", Technical Digest of Conference on Laser and Electro-Optics (CLEO), Vol. 15, pp224-225, 1995.

Year 1994

B.S. Ooi, A.C. Bryce, C.D.W. Wilkinson, and J.H. Marsh, "Study of reactive ion etching-induced damage in GaAs/AlGaAs structures using a quantum well intermixing probe", Applied Physics Letter. Vol. 64, No.5, pp598-600, 1994. B.S. Ooi, A.C. Bryce, J.H. Marsh, and J. Martin, "Transmission electron microscope study of fluorine and boron implanted and annealed GaAs/AlGaAs", Applied Physics Letter, Vol. 65, No. 1, pp87-89, 1994. B.S. Ooi, "Fabrication of Photonic Integrated Circuits Using Quantum Well Intermixing", PhD Thesis, University of Glasgow, 1994.
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