optoelectronics

InGaN-based light-emitting devices

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B9 L2 H1

III-Nitride-based light-emitting diodes (LEDs) are already commercialized for instance blue and green LEDs. It is very contributed as energy saving light source all over the world. This material is a very attractive material, capable of the emitting range is not only blue light but also UV and visible light. Moreover, application as a power device is also possible, it is one of the materials considered to lead the energy saving society in the future. Visible light LED has a wide range of applications. Visible light LED has a wide range of applications. we expect that there is some application, for instance, μ-LED display, optical communication, plant cultivation, medical treatment, and so on. In the seminar, I will talk about III-Nitride-based visible light emitting devices and introduce recent research with outstanding metalorganic chemical vapor deposition (MOCVD) growth technique.

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.

CEMSE Welcomes new Professor: Dr. Jr-Hau

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Prof. He joins from National Taiwan University, where he was a tenured associate professor of Electrical Engineering.

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.

Visiting Ph.D. Student Meng-Lin Tsai and Prof Jr-Hau He device the thinnest highly-efficient solar cell

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At King Abdullah University of Science and Technology (KAUST), a team of researchers developed what might be the effective solution to the problem: the thinnest solar cells with lateral geometry offering high optoelectronic performances while reducing production costs of extended photovoltaic architecture. The research was recently published in Advanced Material and reported by Nature Middle East.

Jr-Hau He elected SPIE Fellow

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Jr-Hau He, KAUST associate professor of electrical engineering, has recently been elected as an SPIE Fellow for his achievements in solar cells, photodetectors and semiconductor optics research. SPIE, the international society for optics and photonics, annually recognizes society members who have made significant scientific and technical contributions in the multidisciplinary fields of optics, photonics and imaging, and for their outstanding technical contributions and service to SPIE. He and 72 additional fellows of the society will be promoted later this year.

KAUST Associate Professor Jr-Hau He wins Nano Energy Award 2019

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The Beijing Institute of Nanoenergy and Nanosystems of the Chinese Academy of Sciences recently announced that KAUST Associate Professor Jr-Hau He is one of three selected scholars who will receive the Nano Energy Awards 2019.

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.

Xiaohang Li

Professor Li is a leading scholar in the research of (ultra)wide bandgap semiconductors and high density stacked transistor IC that are bringing revolutionary impacts on the optoelectronic and electronic industries.

Rongyu Lin

Rongyu Lin is a Ph.D. student at the Advanced Semiconductors Laboratory under the supervision of Prof. Xiaohang Li at King Abdullah University of Science and Technology (KAUST). He received his Bachelor of Science in Physics from the Southern University of Science and Technology. Research Interest Rongyu's research interests include 2D materials characterization, device fabrication, and Optoelectronics.

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

Osman M. Bakr

Osman M. Bakr is a professor of Material Science and Engineering at KAUST, specializing in the physics and chemistry of nanomaterials with unique optical, electronic, and magnetic properties. His research focuses on the development of hybrid nanomaterials for solar cells, batteries, and photonic devices.

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

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

Mohamed Ebaid

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

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

Hadi Amata

Hadi Amata is a Research Scientist in the Computational Imaging Group (VCCIMAGING) working with Professor Wolfgang Heidrich at King Abdullah University of Science and Technology (KAUST). Education and Early Career Dr. Amata received his master degree in Electronics/Microelectronics from Provence University in France in 2008. He obtained a doctoral in Electrical Engineering “Optics and Photonics” from Jean Monnet University of Saint Etienne in France in 2012. He started his career life as a teaching assistant at Saint-Étienne Institute of Technology (IUT) in 2010. He was also a teaching

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

Daisuke Iida

Senior Research Scientist, Electrical and Computer Engineering
Daisuke Iida is a Senior Research Scientist at Energy Conversion Devices and Materials (ECO Devices) Laboratory in the Division of Computer, Electrical and Mathematical Sciences & Engineering (CEMSE). He holds a Ph.D. in Materials Science and Engineering from Meijo University in 2011. Afterward, he held postdoctoral and visiting researcher positions at Meijo University and Technical University of Denmark. Then, he worked as an assistant professor at Tokyo University of Science from 2014 to 2017. His research interest is III-nitride semiconductors-based optoelectronic devices, especially 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.