Terahertz quantum well photodetectors

H. Luo; H. C. Liu; C. Y. Song; Z. R. Wasilewski; A. J. SpringThorpe; J. C. Cao

doi:10.1117/12.680885

29 August 2006 Terahertz quantum well photodetectors

H. Luo, H. C. Liu, C. Y. Song, Z. R. Wasilewski, A. J. SpringThorpe, J. C. Cao

Proceedings Volume 6308, Photonics for Space Environments XI; 63080N (2006) https://doi.org/10.1117/12.680885
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

The development of technologies in the terahertz spectrum or the very-far-infrared region has been slow mainly because of lack of convenient detectors and lasers. We report on the design and simulated performance of quantum-well photodetectors for the terahertz (1 - 10 THz). Quantum well, barrier, and doping parameters are optimized in terms of operating temperature, absorption, and detectivity. We also report on our experimental demonstration of GaAs/AlGaAs photodetectors with background limited infrared performance (BLIP). These devices are suited for a variety of applications, especially in conjunction with the newly developed THz quantum cascade lasers. One of such example is THz free space communication.

Citation Download Citation

H. Luo, H. C. Liu, C. Y. Song, Z. R. Wasilewski, A. J. SpringThorpe, and J. C. Cao "Terahertz quantum well photodetectors", Proc. SPIE 6308, Photonics for Space Environments XI, 63080N (29 August 2006); https://doi.org/10.1117/12.680885

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