4 June 2015 Type-II superlattice detector for long-wave infrared imaging
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Abstract
When incorporated into the active layer of a "XBp" detector structure, Type II InAs/GaSb superlattices (T2SLs) offer a high quantum efficiency (QE) and a low diffusion limited dark current, close to MCT Rule 07. Using a simulation tool that was developed to predict the QE as a function of the T2SL period dimensions and active layer stack thickness, we have designed and fabricated a new focal plane array (FPA) T2SL XBp detector. The detector goes by the name of "Pelican-D LW", and has a format of 640 ×512 pixels with a pitch of 15 μm. The FPA has a QE of 50% (one pass), a cut-off of ~9.5 μm, and operates at 77K with a high operability, background limited performance and good stability. It uses a new digital read-out integrated circuit, and the integrated detector cooler assembly (IDCA) closely follows the configuration of SCD’s Pelican-D MWIR detector.
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P. C. Klipstein, E. Avnon, Y. Benny, A. Fraenkel, A. Glozman, E. Hojman, E. Ilan, E. Kahanov, O. Klin, L. Langof, Y. Livneh, I. Lukomsky, M. Nitzani, L. Shkedy, I. Shtrichman, N. Snapi, R. Talmor, A. Tuito, S. Vaserman, E. Weiss, "Type-II superlattice detector for long-wave infrared imaging", Proc. SPIE 9451, Infrared Technology and Applications XLI, 94510K (4 June 2015); doi: 10.1117/12.2175848; https://doi.org/10.1117/12.2175848
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