Mid-infrared photodetection in an AlGaAs/GaAs quantum-well infrared photodetector using photoinduced noise

Autor(es)

Fernandes, F. M. ^{[1, 2]} ; da Silva, E. C. F. ^[1] ; Quivy, A. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil

^[2] Optovac Mecan & Optoelet LTDA, BR-12244000 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 118, n. 20 NOV 28 2015.
• Citações Web of Science: 2

Resumo

We propose a new way to assess the output signal of a quantum-well infrared photodetector (QWIP). Instead of measuring the photocurrent produced by the device, as usually done, we show that the noise induced by the absorption process can be used to generate a useful detection signal. We built a simple electronic circuit able to quantify the noise of an AlGaAs/GaAs QWIP that was intentionally designed to produce no photocurrent at all, and we demonstrated that such a circuit was able to generate a strong output signal whenever an infrared radiation of a specific wavelength was shed on the detector. This concept opens new possibilities for the design of novel types of photodetection systems. (C) 2015 AIP Publishing LLC. (AU)

• Processo FAPESP: 08/00841-7 - Responsividade e ruído de fotodetectores infravermelhos baseados em poços e pontos quânticos crescidos por epitaxia de feixe molecular
• Beneficiário: Alain André Quivy
• Linha de fomento: Auxílio à Pesquisa - Regular