红外与毫米波学报, 2015, 34 (4): 385, 网络出版: 2015-10-22
Dark current suppression in HOT LWIR HgCdTe heterostructures operating in non-equilibrium mode
Dark current suppression in HOT LWIR HgCdTe heterostructures operating in non-equilibrium mode
摘要
Abstract
Typically, infrared detectors require cryogenic cooling to limit dark current which is directly dependent on Auger generation-recombination mechanism and highly influential in HgCdTe-narrow band gap material. The Auger suppressed architectures have an advantage over conventional detectors allowing operation at elevated temperatures >200 K. Architecture with combination of exclusion and extraction heterojunctions has been proposed to lower Auger contribution. The paper presents a new long-wave (≈ 10 μm) infrared HgCdTe architecture with graded gap/doping interfaces and extra barrier located in exclusion heterojunction to suppress dark current for high operating temperature conditions. Proper barrier implementation reduces dark current by more than 20 A/cm2 for room temperature operation.
Martyniuk P, Gawron W, Pawluczyk J, Kblowski A, Madejczyk P, Rogalski A. Dark current suppression in HOT LWIR HgCdTe heterostructures operating in non-equilibrium mode[J]. 红外与毫米波学报, 2015, 34(4): 385. Martyniuk P, Gawron W, Pawluczyk J, Kblowski A, Madejczyk P, Rogalski A. Dark current suppression in HOT LWIR HgCdTe heterostructures operating in non-equilibrium mode[J]. Journal of Infrared and Millimeter Waves, 2015, 34(4): 385.