Dissertation Title: Photogain in Silicon-Based Short-Wavelength Infrared Light Sources and Detectors

Date: 2026/05/20 – 2026/05/20

Dissertation Title: Photogain in Silicon-Based Short-Wavelength Infrared Light Sources and Detectors

Speaker: Huayou Liu, Ph.D. candidate at SJTU Global College

Time: May 20 from 3:00-5:00 p.m., 2026

Location: Room 414B, Longbin Building

Abstract

This dissertation focuses on key optoelectronic devices in the short-wavelength infrared (SWIR) regime, namely light-emitting diodes (LEDs) and photodetectors, with emphasis on their gain mechanisms. The dissertation elucidates the underlying microscopic origins of gain phenomena in both light emission and photodetection based on experiments, simulations, and theories. By combining experiments, simulations, and theoretical analysis, this dissertation systematically elucidates multiple optoelectronic gain phenomena and their microscopic physical mechanisms in silicon-based SWIR light sources and photodetectors. These findings deepen the understanding of signal conversion processes in silicon-based SWIR optoelectronic devices and provide important scientific foundations and technical support for the development of next-generation SWIR optoelectronic devices.

Biography

Huayou Liu is a Ph.D. candidate in electrical and computer engineering at the Global College, Shanghai Jiao Tong University, under the supervision of Prof. Yaping Dan. During this period, Liu focuses on the research of silicon-based short-wavelength infrared light sources and detectors and has published three first-author papers.