High responsivity quantum cascade detectors with bound-to-miniband diagonal transition
Author(s): Li, Kun; Ren, Fei; Liu, Shu-Man; Liu, Jun-Qi; Zhuo, Ning; Zhu, Yi-Xuan; Zhai, Shen-Qiang; Zhang, Jin-Chuan; Wang, Li-Jun; Li, Yuan; Liu, Feng-Qi
Source: APPLIED PHYSICS LETTERS Volume: 119 Issue: 5 Article Number: 51101 DOI: 10.1063/5.0058094 Published: AUG 2 2021
Abstract: 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.
Accession Number: WOS:000680136900009
ISSN: 0003-6951
eISSN: 1077-3118
