Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 19, Issue 1, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2012.2201136
Keywords
Imaging; light couplers; quantum-well photodetectors (QWPs); terahertz; wireless communication
Categories
Funding
- 863 Program of China [2011AA010205]
- National Natural Science Foundation of China [61176086, 61131006, 60721004]
- Major National Development Project of Scientific Instrument and Equipment [2011YQ150021]
- Important National Science and Technology Specific Projects [2011ZX02707]
- Hundred Talent Program of the Chinese Academy of Sciences
- Shanghai Municipal Commission of Science and Technology [10JC1417000, 11ZR1444200]
- National Major Basic Research Project [2011CB925603]
- Shanghai Municipal Major Basic Research Project [09DJ1400102]
- [YYYJ-1123-1]
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Terahertz quantum-well photodetectors (QWPs) represent a new and emerging photon-type detector in a terahertz region. Recent progress in the development of terahertz QWPs is reviewed. We first discuss the many-particle effects on the accurate design of terahertz QWPs. Second, three types of light couplers for terahertz QWPs are introduced. At resonant coupling frequencies, the polarization of light field is effectively changed by the light couplers to fulfill the selection rule of intersubband transition. Meanwhile, the electric field intensities in the active multiquantum-well region of terahertz QWPs are enhanced. The performance of terahertz QWPs with these light couplers is improved significantly. Finally, terahertz-QWP-based wireless communication and imaging are demonstrated.
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