Jung Han
Chief Scientist and Inventor
InPHRED
Professor Jung Han is the William A. Norton Professor in Technological Innovation and a Professor of Electrical Engineering at Yale University, where he leads research in wide-bandgap semiconductor materials, optoelectronic and microelectronic devices, and semiconductor epitaxy. He earned his B.S. from National Taiwan University and his M.S. and Ph.D. in electrical engineering from Purdue University. Before Yale, he pioneered AlGaN growth for ultraviolet emitters at Sandia National Laboratories. Professor Han has authored over 220 peer-reviewed papers with more than 15,000 citations, holds seven U.S. patents, co-founded two spin-off companies, and is a fellow of both IEEE and the Institute of Physics.
Presentations
Unlocking the Future: Nanoporous Compound Semiconductor Technology for Next-Gen Sensing, Digital Health and Energy-Efficient Data Centers Optical Interconnect
Compound semiconductor optoelectronics underpin a wide range of modern technologies, yet further progress increasingly depends on manufacturable device architectures. In this talk, we introduce a novel electrochemical approach for engineering the refractive index of compound semiconductors, enabling device structures that are difficult to realize using conventional epitaxial or dielectric methods. As a representative example, we demonstrate manufacturable InP-based short-wave infrared (SWIR) vertical-cavity surface-emitting lasers (VCSELs) using nanoporous semiconductor structures. This platform provides precise index control, robust optical confinement, and wafer-scale scalability. Efficient continuous-wave operation with power conversion efficiency up to 30% is achieved, together with excellent reliability and reproducibility. Potential applications in SWIR sensing, digital health, and emerging optical interconnects are discussed.