Gain and resonant tunneling in interband cascade IR photodetectors

Rui Q. Yang; Wenxiang Huang; Lu Li; Lin Lei; Jeremy A. Massengale; Tetsuya D. Mishima; Michael B. Santos

doi:10.1117/12.2289121

26 January 2018 Gain and resonant tunneling in interband cascade IR photodetectors

Rui Q. Yang, Wenxiang Huang, Lu Li, Lin Lei, Jeremy A. Massengale, Tetsuya D. Mishima, Michael B. Santos

Proceedings Volume 10540, Quantum Sensing and Nano Electronics and Photonics XV; 105400E (2018) https://doi.org/10.1117/12.2289121
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Interband cascade IR photodetectors (ICIPs) are multi-stage detectors with discrete absorbers separated by unipolar electron and hole barriers. In this multi-stage detector architecture, the absorber in each stage is designed with a thickness that is thinner than the carrier diffusion length so that photo-generated carriers can be collected efficiently and quickly. This advantage has been validated with the operation of ICIPs at high temperatures (>400 K) and high frequencies (up to 1.3 GHz). Recently, electrical gain exceeding unity was observed in ICIPs. Also, negative differential conductance (NDC) was observed at high temperatures. In this paper, we will discuss the underlying physics of the NDC and a new mechanism that should well explain the electrical gain in ICIPs, as well as our progress towards improved understanding and high temperature performance.

Citation Download Citation

Rui Q. Yang, Wenxiang Huang, Lu Li, Lin Lei, Jeremy A. Massengale, Tetsuya D. Mishima, and Michael B. Santos "Gain and resonant tunneling in interband cascade IR photodetectors ", Proc. SPIE 10540, Quantum Sensing and Nano Electronics and Photonics XV, 105400E (26 January 2018); https://doi.org/10.1117/12.2289121

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