摘要

Semiconductor quantum and nano-structures have not only enabled discoveries of new phenomena but also realizations of novel photonic devices. In this talk I will introduce those devices that I have been working on and discuss my future plans. The first one is the, by now, well-established quantum-well infrared photodetector (QWIP). Here I will discuss its potential for applications in laboratories and environmental sensing in the infrared (IR) spectrum, and also our recent work on THz QWIPs. Quantum cascade laser (QCL) is another emerging and promising device. I will review the current OCL status and our record-holding three-well resonant-phonon design for the terahertz (THz) region. Together with QWIPs, QCLs form a very promising technology base for sensing.

报告人简介

Dr. Liu got his BSc in physics from Lanzhou University in 1982, went to the USA for postgraduate study via the CUSPEA program and got his PhD in applied physics from the University of Pittsburgh in 1987 as an Andrew Mellon Predoctoral Fellow. Dr. Liu is currently a “1000-people” chair professor in the physics department of the Shanghai Jiao Tong University and the Imaging Devices Group Leader in the Institute for Microstructural Sciences at the National Research Council of Canada. Dr. Liu has authored and co-authored over 358 refereed journal articles (with about 95 first or sole authored), and given 127 talks (85 invited) at international conferences. He has been elected as Fellows of the American Physical Society (APS), of the Institute of Electrical and Electronics Engineers (IEEE), and of the Academy of Sciences – Royal Society of Canada (RSC); granted 13 US patents; awarded the Herzberg Medal from the Canadian Association of Physicists in 2000, the Bessel Prize from the Alexander von Humboldt Foundation in 2001, the Chinese Overseas Distinguished Young Scientist Award (NSFC-B) in 2005, and the Overseas Changjiang Chair Professorship in 2008.