optoelectronics

Study of ultraviolet AlGaN nanowires light-emitting diodes

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B3 L5 R5209

Ultraviolet (UV) group III-Nitride-based light emitters have been used in various applications such as water purification, medicine, lighting and chemical detection. Despite attractive properties such as bandgap tunability in the whole UV range (UV-C to UV-A), high chemical stability and relative low cost, the low quantum efficiency hamper the full utilization. This thesis aims to show alternative solutions to such problems by employing nanowires (NWs) structures, and target the eventual application of reliable and high power NWs-based light-emitting devices, enabling large-scale production using the established silicon foundry processes. Here, we present the improvement of injection current and optical power of AlGaN NWs LEDs by involving a metal bilayer thin film with a dual purpose: eliminate the potential barrier for carrier transport, and inhibit the formation of silicide.

Study of III-nitride Nanowire Growth and Devices on Unconventional Substrates

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B3 L5 R5209

This thesis aims to investigate the microscopic characteristics of the nanowires and expand on the possibility of using transparent amorphous substrate for III-nitride nanowire devices. In this work, we performed material growth, characterization, and device fabrication of III-nitride nanowires grown using molecular beam epitaxy on unconventional substrates including silicon substrates and fused silica substrates. We also investigated the effect of various nucleation layers on the morphology and quality of the nanowires.

Hybrid integration of materials for ultraviolet detection

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B9 L2 H1 R2322

Semiconductors are pervasive in consumer electronics and optoelectronics, and the related optical devices are deemed disruptive that Nobel Prize in Physics in 2014 was awarded to the inventors of blue light-emitting diodes (LEDs), which “has enabled bright and energy-saving white light sources”. While AlInGaN-based lasers and LEDs, and silicon-based photodetectors are currently matured, unconventional usage based on the materials has demonstrated their further potential, including solar-hydrogen generation, indoor-horticulture, and high-speed communication.

Deep-Ultraviolet Optoelectronic Devices Enabled by the Hybrid Integration of Next-Generation Semiconductors and Emerging Device Platforms

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B3 L5 R5209

In this dissertation, the design and fabrication of deep-ultraviolet photodetectors, based on gallium oxide and its alloys, through the heterogeneous integration with metallic and other inorganic materials is investigated. The crystallographic properties of grown oxide films formed directly and indirectly on silicon, magnesium oxide, and sapphire are examined, and the challenges that hinder the realization of efficient and reliable deep-ultraviolet photodetectors are elaborated on. I provide an overview of aluminum nitride, gallium oxide, sapphire, and silicon substrates as platforms for deep-ultraviolet optoelectronic devices, in which I elaborate on the challenges associated with using sapphire as a platform for efficient deep-ultraviolet devices and detail advancements in device growth and fabrication on silicon and magnesium oxide substrates.

Nanoscale patterning is better with gas

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Adding a gas enhances the processing of hybrid organic-inorganic materials for improved solar cells.

IEDM 2016 session "Optoelectronic Integration" chaired by Prof. Ooi and Chao Shen presents his work

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During the 62nd IEEE International Electron Devices Meeting (IEDM) conference 2016 Prof. Ooi chairs a session and Chao Shen presents his work.

Yue Wang

Yue Wang is a M.S./Ph.D. student at King Abdullah University of Science and Technology (KAUST). She obtained bachelor degree of Electronic Science and Technology from University of Electronic Science and Technology of China (UESTC) in 2020. She took part in the Visiting Student Research Program (VSRP) at KAUST during the summer of 2019.

Yara Mostafa

Visiting Student, Photonics Laboratory
Capstone Project 2014​ Yara Mostafa was a senior undergraduate student majoring in Electrical and Computer Engineering with a concentration in microelectronics at Effat University, Saudi Arabia. She was selected by Professor Boon S. Ooi to conduct research and develop her graduation/senior project the Three Dimensional RGB Light Emitting Diode Cube. Research Interests Yara's research interests included Nanotechnology, Solid-state devices, and Optoelectronics.

Siti Nurul Waheeda Mohmad Zaini

Visiting Student, Photonics Laboratory
Siti Nurul Waheeda graduated in November 2015 in a Master of Science (Physics). She is a Ph.D. Student from the Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia. She joined the Photonics Laboratory at King Abdullah University of Science and Technology (KAUST), as a visiting student. Research Interests Siti's research interests included GaN, Nanomaterials, Molecular Beam Epitaxy and Optoelectronics. Professional Profile Active in research and development in solid-state lighting solution and semiconductor device, especially for gallium nitride (GaN)

Redha Al Ibrahim

Postdoctoral Research Fellow, Electrical and Computer Engineering
Ph.D student at Photonics Laboratory in the Division of Computer, Electrical and Mathematical Sciences & Engineering (CEMSE) at King Abdullah University of Science & Technology (KAUST). Education Profile January 2020 - Present, Ph.D. in Electrical Engineering at KAUST, Thuwal, Saudi Arabia August 2018 - December 2019, M.S. in Electrical Engineering at KAUST, Thuwal, Saudi Arabia August 2014 - May 2018, B.S in Optics at University of Rochester, Rochester, NY, USA Professional Memberships ​Member of OSA (Optical Society of America) Member of SPIE (International Society for Optics and Photonics)

Omar Alkhazragi

Introduction Omar Alkhazragi received the degree of Bachelor of Science in Electrical Engineering in 2018 from King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia, and a master’s degree in electrophysics in 2019 from King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. He is now an electrophysics Ph.D. student in the Photonics Laboratory at KAUST. The primary focus of his research is on optoelectronic devices fabrication and applications, including optical and quantum communication. Research Interests Photonics and optoelectronics Semiconductor

Ohoud K. Alharbi

Visiting Student, Photonics Laboratory
Ohoud Alharbi was a Visiting student from KAU at Professor Boon Ooi's Photonics Laboratory at King Abdullah University of Science and Technology (KAUST). She was a visiting student in the CEMSE SSI program in 2019. Despite her major, she gained more experimental experience in the field of Photonics, which is considered as her future graduate studies. Research Interests Ohoud's research interests included ​Electromagnetics, Photonics, and Optoelectronics.

Mohammed Abdul Majid

Postdoctoral Research Fellow, Photonics Laboratory
Mohammed Abdul Majid was a Postdoctoral Fellow at Photonics Laboratory at King Abdullah University of Science and Technology (KAUST), where he worked on applying III/V semiconductor quantum dot/quantum well devices to applications such as biomedical imaging, optical communications to solid-state lighting. Mohammed received his M.Sc. degree in Electrical Engineering from King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia in 2002. In 2011, he obtained his Ph.D. degree in Electronic and Electrical Engineering from the University of Sheffield in the U.K. From 2002-2008

Mohammad Khaled Shakfa

Postdoctoral Research Fellow, Photonics Laboratory
Mohammad Khaled Shakfa was a Postdoctoral Fellow at Photonics Laboratory in the Division of Computer, Electrical and Mathematical Sciences & Engineering (CEMSE) at King Abdullah University of Science and Technology (KAUST). Previously, he was a Postdoctoral Research Fellow in the workgroup of Prof. Dr. Martin Koch, Experimental Semiconductor Physics at Philipp University of Marburg (Marburg, Germany). He received his Ph.D. in Electrical Engineering at Braunschweig University of Technology (Braunschweig, Germany) in 2015. His Ph.D. research focused on the investigation of localization effects

Mohamed Ebaid

Postdoctoral Research Fellow, Photonics Laboratory
Currently works at ​Lawrence Berkeley National Lab, California, USA

Lyu Zhou

Visiting Student, Photonics Laboratory
Lyu Zhou was a visiting student from the State University of New York, Buffalo at Professor Boon Ooi's Photonics Laboratory at King Abdullah University of Science and Technology (KAUST). He received his bachelor's degree from the University of Electronic Science and Technology of China. Research Interests Lyu's research interests included ​Photonics, Nanomaterials, and optoelectronics. Selected Publications L. Zhou*, H. Song*, J. Liang, M. Singer, M. Zhou, E. Stegenburgs, N. Zhang, C. Xu, T. K. Ng, Z. Yu, B. Ooi, Q. Gan, A polydimethylsiloxane coated metal structure for all-day radiative

Latifah Al Maghrabi

Latifah Al-Maghrabi is pursuing a master's degree in Electrical Engineering in the electrophysics track at King Abdullah University of Science and Technology (KAUST). Currently, the questions that guide Latifah's journey of investigation revolve around exploring novel lower dimensional materials for integration with group-III-nitride-based optoelectronic devices at the Photonics Laboratory at KAUST. By understanding the physics at the device level, she hopes to be able to enhance optoelectronics used for light and energy generation. In May 2018, Latifah graduated with a B.S. in Electrical

Kuang-Hui Li

Kuang-Hui Li joined Photonics Laboratory at King Abdullah University of Science and Technology (KAUST) in the Fall of 2018. He obtained two bachelor degrees (2011) in Electro-Physics and Applied-Math from National Chiao Tung University, Taiwan. Research Interest Kuang's research interests include Semiconductor epitaxy by MBE, MOCVD, and PLD, Material characterization, e.g. HRXRD, TEM/STEM, RBS, Nanofabrication processes, Semiconductor optoelectronics devices (LED, Photodetector, Laser). His current research focuses on III-oxide material and heterostructures for device applications such as UV

Juan Manuel Marin Mosquera

PhD Student juan.mosquera@kaust.edu.sa Introduction Juan M. Marin is a PhD student in Electrical Engineering at King Abdullah University of Science and Technology (KAUST). He received a BSc in Electrical Engineering from The National University of Colombia in 2021. His research focuses on Distributed Fiber Optic Sensing (DFOS) and developing multi-configuration systems based on optical fiber, embedding DFOS in optical communication and power delivery networks. Research Interests Fiber Optics Distributed Fiber Optic Sensing Machine Learning Selected Publications Yujian Guo*, Juan M. Marin*

Huafan Zhang

Huafan Zhang is currently a Ph.D. Student in the Photonics Laboratory. She obtained her BEng. (2017) in Electronic science and technology from the University of Electronic Science and Technology of China (UESTC), Chengdu, China. She joined King Abdullah University of Science and Technology (KAUST) in the Fall of 2017 and achieved MSc in Electrical Engineering at KAUST in 2018. Her current research focuses on III-Nitride nanowire-based photoelectrochemical water splitting, radiative cooling for optoelectronic devices and materials for water collections. Research Interests Her research interests

Haomin Song

Visiting Student, Photonics Laboratory
Haomin Song was an international visiting PhD student from the State University of New York, Buffalo, at Professor Boon Ooi's Photonics Laboratory at King Abdullah University of Science and Technology (KAUST). He served as reviewers for various international journals, such as Scientific Reports, Optics Express, Optical Materials Express, Phys. Lett. B, IEEE Photonics J., and J. Mater. Chem. A etc. Research Interests Haomin's research interests included Nano-photonics, Optoelectronics and Bio-photonics for integrated devices/systems. Selected Publications H. Song,* N. Zhang,* J. Duan, Z. Liu, J

Guangyu Liu

Research Scientist, Photonics Laboratory
Guangyu Liu was a Research Scientist at Photonics Laboratory in the Division of Computer, Electrical and Mathematical Sciences & Engineering (CEMSE) at King Abdullah University of Science & Technology (KAUST). She received her Ph.D. in Electrical Engineering at Lehigh University, Pennsylvania, United States of America (USA) in 2013 with the research focus on III-nitride semiconductor nanostructures and optoelectronics for solid-state lighting. Her B.Sc. in Electronic Science and Technology was received with honor at Huazhong University of Science and Technology (HUST), Hubei, China in 2008

Edgars Stegenburgs

Edgars Stegenburgs joined the Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division of KAUST as an MS/Ph.D. student and graduate researcher at Photonics Laboratory in January 2015. Previously he was working in the Laser Centre of the University of Latvia as a natural sciences laboratory assistant under the supervision of Dr. Aigars Ekers in the Laser-manipulation laboratory. There he developed his bachelor thesis "Formation of bright and dark states in non-degenerate quantum systems and ultra-high vacuum system design for Rb atoms magneto-optical trap" and earned the

Davide Priante

Davide Priante obtained his Ph.D. and Master's degree in Electrical Engineering under the supervision of Professor Boon Ooi at King Abdullah University of Science and Technology (KAUST). Davide received his B.Sc. degree in Material Science Engineering from the University of Padova, Italy, in 2013. He joined KAUST in February 2014 as an M.S. to a Ph.D. student in Photonics Laboratory in the Computer, Electrical, and Mathematical Sciences & Engineering (CEMSE) Division. He received his MSc degree in August 2015 with a thesis based on the recombination mechanism of CH3NH3PbBr3 perovskite. Davide

Chao Shen

Chao Shen received his Ph.D. degree in Electrical Engineering under the supervision of Professor Boon Ooi at King Abdullah University of Science and Technology (KAUST). Currently, Chao is working as a Consultant at KAUST, with KAUST Innovation and Economic Development. Research Interests Chao's research interests included GaN optoelectronics, III-nitride​ diode lasers, Photonic integrated circuits, and Laser-based solid-state lighting, visible-light communications, III-nitride photonic integrated circuit, GaN-based laser diodes, superluminescent diodes (SLDs), micro-LEDs, and VCSELs, laser

Carmen Leticia Castrejon Barron

Carmen Leticia Castrejon Barron is a Ph.D. candidate at Energy Conversion Devices and Materials (ECO Devices) Laboratory under the supervision of Professor Kazuhiro Ohkawa at King Abdullah University of Science and Technology (KAUST). Education MSc, Electrical Engineering, KAUST, Saudi Arabia, 2016 ME, Education, Tec Milenio university, Chihuahua, Mexico, 2013 BSc, Electromechanical Engineering, Instituto Tecnologico de Ciudad Jimenez, 2009 Research Interests Carmen's research interests include Light sources, Solar Energy, Plant biology and Desert agriculture.

Abdullah A. Alhamoud

Abdullah Ali Alhamoud is an ambitious and enthusiastic Saudi professional with more than 5 years of deep technical experience in leading KACST knowledge transfer projects. An explorer personality seeking a new challenge and value-adding experiences. He obtained his Bachelor's degree in Electrical Engineering, King Saud University, Saudi Arabia at 2008. In 2014 he obtained his Master's degree in optical Nanotechnology, University of Kassel, Germany. From 2009 to present, Abdullah is working as an Electrical Engineering in King Abdulaziz City for Science and Technology(KACST). KACST is the