Colloquia 2007

Colloquia 2007

Terahertz Nano-Optoelectronics

Dr. H.C. Liu
National Research Council of Canada

4-5 p.m., Tuesday, 4th December 2007

School of Physics Common Room
Room 64, Old Main Building

Terahertz (THz) technology is generally regarded as one of the most promising candidates to bring about totally new and revolutionary applications. The aim of my research is twofold: (1) good science in nanostructures and (2) creation of sensing technologies based on THz nano-optoelectronics. Here, the nanostructures are semiconductor quantum dots (QD) and quantum wells (QW) as well as their combinations. With QDs and QWs, atomic-like quantum processes between confined levels within the conduction band (intersublevel and intersubband transition) are studied, THz nanodevices such as emitters and detectors are investigated. Examples to be discussed are intersublevel transition in QDs and possible implementation of THz lasers based on this process, THz quantum well photodetectors, THz quantum cascade lasers, quantum optic processes, and potentially unique applications in the THz spectrum.

Dr. Liu joined the Institute for Microstructural Sciences of the National Research Council of Canada in 1987. He is currently the Terahertz & Imaging Devices Group Leader in the Institute. Dr. Liu has authored or co-authored more than 300 refereed journal articles (with about 90 as first or sole author), and given more than 108 presentations (67 invited) at international conferences. He was elected Fellow of the American Physical Society (APS) and Fellow of the Institute of Electrical and Electronics Engineers (IEEE), has been granted over a dozen patents, and has been awarded the Herzberg Medal from the Canadian Association of Physicists in 2000, the Bessel Prize from the Alexander von Humboldt Foundation in 2001, and the Chinese Overseas Distinguished Young Scientist Award (NSFC-B) in 2005. He holds chair/adjunct/guest/honorary professorships in 11 institutions in Canada, China, and the USA.

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