期刊
APPLIED PHYSICS LETTERS
卷 113, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5046881
关键词
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资金
- National Key R&D Program of China [2017YFF0106302, 2017YFA0701005]
- Major Program of the National Natural Science Foundation of China [61731020]
- 973 Program of China [2014CB339803]
- National Natural Science Foundation of China [61775229, 61574155, 61604161]
- Shanghai Municipal Commission of Science and Technology [15JC1403800, 15DZ0500103, 17ZR1448300, 17YF1429900]
In this letter, a broadband bias-tunable terahertz (THz) quantum well infrared photodetector (QWIP) with a GaAs/AlGaAs asymmetric step multi-quantum well using the intersubband transition was proposed, designed, fabricated, and characterized. It is found that the THz QWIP has two photon response peaks at 4.5 THz and 6.5 THz and the bias-tunable photon response in the 4.0-6.5 THz frequency range of the device is attributed to the field-assisted tunneling of electrons in the second excitation subbands to continuum states. Published by AIP Publishing.
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