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Speaker: Jung Han
Affiliation: Yale University, Department of Electrical Engineering
Seminar title: New frontiers in GaN optoelectronic research
Abstract
In the past 30 years, GaN emerged as one of the most important semiconductors that has made real impact to our society. The phenomenal progress by academia and industry has focused primarily on controlling and perfecting the electronic properties. New opportunities and challenges arise as one tries to engineer the photonic properties of GaN devices. In this talk I will share my perspective regarding the history, breakthroughs, major applications, and new opportunities associated with this material system. Especially I will focus on how nanotechnology based on electrochemistry can help to circumvent impasses and create new dimensions in the exploration of optoelectronic devices using GaN. Examples will be given in edge-emitting laser diodes, micro-LEDs, and VCSELs.
The research is supported by US Department of Energy, National Science Foundation, DARPA, Saphlux Inc, and IP Groups.
Speaker Biosketch
Jung Han is the William Norton Professor in Technological Innovation and a Professor of Electrical Engineering at Yale University in New Haven, Connecticut. Professor Han’s current research activities include blue, green, and ultraviolet (UV) light emitting devices for solid-state lighting and displays, synthesis of AlGaInN nanostructures, nanoscale phenomena in crystal growth, and AlGaInN power electronic devices. Before joining Yale in 2001, Prof Han worked at Sandia National Labs and helped the launching of the GaN effort which remains active till now. Between 2010 and 2016 Prof Han served as the Chairman of the EE Department at Yale. He has published more than 300 papers in peer-reviewed journals, and has served as editor of four books and special journal issues. He holds more than 30 U.S. and international patents and is the co-founder of Saphlux, a startup company based on his inventions for semipolar GaN LEDs and micro-LEDs. Prof. Han has received numerous awards including a Department of Commerce R&D 100 Award, MRS Ribbon Award, EMC Best Paper Award and the Electronics and Photonics Award from the Electrochemical Society (ECS). Prof. Han is a member of the Connecticut Academy of Science and Engineering, and a Fellow of the Institute of Physics (IoP), the Institute of Electrical and Electronic Engineers (IEEE), and the Optical Society of America (OSA).
