期刊
APPLIED PHYSICS LETTERS
卷 119, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0058094
关键词
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资金
- National Natural Science Foundation of China [61835011, 61774151]
- Key Program of the Chinese Academy of Sciences [XDB43000000]
- Science Foundation of Beijing Academy of Quantum Information Sciences [Y18G02]
The article describes a long-wavelength infrared quantum cascade detector that utilizes a miniband structure to increase absorption strength and electron extraction efficiency, resulting in high responsivities at a wavelength of 10.55 μm.
We demonstrate a long-wavelength infrared quantum cascade detector (QCD) that operates at a wavelength of 10 mu m, in which the active diagonal transition for the electrons occurs from a fundamental energy level into a miniband in adjacent coupled quantum wells. When compared with a bound-to-bound diagonal transition-based QCD, the use of a miniband as the final transition state increases the absorption strength and enhances the electron extraction efficiency of the device, leading to QCD responsivities of 75 at 180 and 30 mA/W at 300 K for 10.55 mu m wavelength operation.
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