1. Photon-assisted resonant tunneling through a double-barrier structure for infrared radiation detection
- Author
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M Lax, RR Alfano, T. F. Zheng, P. Hu, K Shum, W. Cai, Cai, W, Zheng, Tf, Hu, P, Lax, M, Shum, K, and Alfano, Roberto
- Subjects
Materials science ,Photon ,business.industry ,Orders of magnitude (temperature) ,Scanning tunneling spectroscopy ,General Physics and Astronomy ,Electron ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Molecular physics ,Tunnel effect ,Dark state ,Optoelectronics ,Transmission coefficient ,business ,Quantum tunnelling - Abstract
A Green's-function approach is employed to calculate the electron tunneling through a double-barrier device for infrared-radiation detection. Electrons photoexcited by an ir beam undergo transitions to a resonant channel, so that the transmission coefficient for tunneling substantially increases by several orders of magnitude compared with the dark state. This photon-induced resonant tunneling can be switched and controlled by a change of the applied static voltage. Such a system is ideal for ir photodetectors.
- Published
- 1990
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