Design of broadband QWIPs

V. Guériaux; V. Trinité; A. Coulibaly; L. Dua; N. Brière de l'Isle; X. Marcadet; E. Costard; P. Bois; A. Nedelcu

doi:10.1117/12.886889

20 May 2011 Design of broadband QWIPs

V. Guériaux, V. Trinité, A. Coulibaly, L. Dua, N. Brière de l'Isle, X. Marcadet, E. Costard, P. Bois, A. Nedelcu

Proceedings Volume 8012, Infrared Technology and Applications XXXVII; 80120P (2011) https://doi.org/10.1117/12.886889
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

One of the key features of quantum well infrared photodetectors is the narrow absorption band. However, some applications, as the infrared spectroscopy, require broadband detection. Several approaches have been used to get a broadband response with QWIPs (superlattices, digital graded barriers, stacks, etc.). In this paper, we focus on the interlaced configuration and on the coupled wells structure. Both designs exhibit broadband response covering the [11-15 μm] spectral range. The experimental dependencies of the spectral shape versus the temperature and bias voltage are discussed. Based on numerical model, we propose a specific design strategy which leads to a spectral shape quasiindependent on the operating conditions.

Citation Download Citation

V. Guériaux, V. Trinité, A. Coulibaly, L. Dua, N. Brière de l'Isle, X. Marcadet, E. Costard, P. Bois, and A. Nedelcu "Design of broadband QWIPs", Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80120P (20 May 2011); https://doi.org/10.1117/12.886889

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