Quantum well infrared photodetector simultaneously working in the two atmospheric windows

Y. H. Huo; W. Q. Ma; Y. H. Zhang; M. Chong; T. Yang; L. H. Chen; Y. L. Shi

doi:10.1117/12.836647

5 August 2009 Quantum well infrared photodetector simultaneously working in the two atmospheric windows

Y. H. Huo, W. Q. Ma, Y. H. Zhang, M. Chong, T. Yang, L. H. Chen, Y. L. Shi

Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 73831P (2009) https://doi.org/10.1117/12.836647
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

We have demonstrated a dual-band quantum well infrared photodetector (QWIP) exhibiting simultaneous photoresponse both in the mid and the long wavelength atmospheric windows of 3-5 μm and of 8-12 μm, but the device only has two ohmic contacts. The structure of the device was achieved by sequentially growing a mid wavelength part (MWQWIP) followed by a long wavelength part (LWQWIP) separated by an n+ layer. Comparing with the conventional dual-band QWIP device utilizing three ohmic contacts, our QWIP is promising to greatly facilitate the two-color focal plane array (FPA) fabrication by reducing the number of the indium bump per pixel from three to one just like a monochromatic FPA fabrication; another advantage may be that this QWIP FAP boasts two-color detection capability while only using a monochromatic readout integrated circuit.

Citation Download Citation

Y. H. Huo, W. Q. Ma, Y. H. Zhang, M. Chong, T. Yang, L. H. Chen, and Y. L. Shi "Quantum well infrared photodetector simultaneously working in the two atmospheric windows", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73831P (5 August 2009); https://doi.org/10.1117/12.836647

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