Multicolour infrared detection with In0.1Ga0.9As / Al0.33Ga0.67As double and triple-coupled quantum well infrared photodetectors

A. J. Stead, M. Missous

Research output: Contribution to conferencePaperpeer-review

Abstract

Two structures, designed to detect two and three infrared colours using coupled quantum wells in the are demonstrated. Both structures were initially grown without contacts on double-sided substrates to facilitate infrared absorption measurements. The 'two-colour' sample shows absorption at 7.4μm and 9.1μm, whereas the 'three-colour' sample shows absorption at 6.25μm, 9.5μm and 12.8μm. To our knowledge this is the first time coupled quantum wells of the same composition have been used to detect multiple colours. Samples were then grown with contact layers to facilitate photoresponse measurements. Current-voltage and black body responsivity measurements are presented for these devices.

Original languageEnglish
Pages119-124
Number of pages6
Publication statusPublished - 1 Dec 1999
Event7th International Symposium on 'High Performance Electron Devices for Microwave and Optoelectronic Applications' (EDMO'99) - London, UK
Duration: 22 Nov 199923 Nov 1999

Conference

Conference7th International Symposium on 'High Performance Electron Devices for Microwave and Optoelectronic Applications' (EDMO'99)
CityLondon, UK
Period22/11/9923/11/99

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