GaAs homojunction interfacial workfunction internal photoemission far-infrared detectors

Henry X. Yuan; A. G. Unil Perera; M. H. Francombe; Sisira Kankanam Gamage; Hui Chun Liu; Margaret Buchanan; William J. Schaff

doi:10.1117/12.255156

22 October 1996 GaAs homojunction interfacial workfunction internal photoemission far-infrared detectors

Henry X. Yuan, A. G. Unil Perera, M. H. Francombe, Sisira Kankanam Gamage, Hui Chun Liu, Margaret Buchanan, William J. Schaff

Author Affiliations +

Proceedings Volume 2816, Infrared Detectors for Remote Sensing: Physics, Materials, and Devices; (1996) https://doi.org/10.1117/12.255156
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

We report, for the first time, experimental FIR detector results based on p-GaAs homojunction interfacial workfunction internal photoemission (HIWIP) structures. The MBE grown samples consist of a multilayer (p⁺- p^--p⁺-p^--...) structure. The detector shows high responsivity over a wide wavelength range with a bias tunable cutoff wavelength ((lambda) _c). Changing the emitter layer (p⁺) doping concentration (N_e) will result in different (lambda) _cs. For a detector with N_e equals 3 multiplied by 10¹⁸ cm^-3, an effective quantum efficiency of 9.2% (at 26.3 micrometer) with (lambda) _c equals 100 micrometer is obtained. Various experimental results are discussed.

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Henry X. Yuan, A. G. Unil Perera, M. H. Francombe, Sisira Kankanam Gamage, Hui Chun Liu, Margaret Buchanan, and William J. Schaff "GaAs homojunction interfacial workfunction internal photoemission far-infrared detectors", Proc. SPIE 2816, Infrared Detectors for Remote Sensing: Physics, Materials, and Devices, (22 October 1996); https://doi.org/10.1117/12.255156

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