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Proceedings Paper

Large-format blocked-impurity-band focal plane arrays for long-wavelength infrared astronomy
Author(s): Maryn G. Stapelbroek; David H. Seib; James E. Huffman; Richard A. Florence
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Paper Abstract

Large-format, very-long-wavelength infrared (VLWIR) hybrid focal plane arrays (HFPAs) based on doped-silicon blocked-impurity-band (BIB) detectors have been developed and demonstrated for a variety of astronomy applications. An HFPA consists of a BIB detector array interfaced via indium column interconnects to a matching cryogenic signal processor/multiplexer. Arsenic-doped silicon (Si:As) BIB detector arrays with useful photon response out to nearly 30 micrometers are the most fully developed embodiment of this technology. HFPAs with Si:As BIB arrays have been optimized for low, moderate, and high infrared backgrounds in 128 X 128-pixel formats, and a high-flux 256 X 256-pixel version is under development. For high-flux applications, both the detector array and multiplexer are optimized to handle incident flux densities > 1016 photons cm-2s-1, providing high spatial uniformity, high pixel operability, and background-limited performance down to low frequencies (< 10 Hz). Antimony-doped silicon (Si:Sb) arrays and 128 X 128-pixel Si:Sb HFPAs having response to wavelengths > 40 micrometers have also been demonstrated, primarily for use at low and moderate backgrounds. BIB technology offers producible, low-cost, high-performance focal planes for astronomy in the VLWIR.

Paper Details

Date Published: 6 June 1995
PDF: 8 pages
Proc. SPIE 2475, Infrared Detectors and Instrumentation for Astronomy, (6 June 1995); doi: 10.1117/12.211291
Show Author Affiliations
Maryn G. Stapelbroek, Rockwell International Science Ctr. (United States)
David H. Seib, Rockwell International Science Ctr. (United States)
James E. Huffman, Rockwell International Science Ctr. (United States)
Richard A. Florence, Rockwell International Science Ctr. (United States)


Published in SPIE Proceedings Vol. 2475:
Infrared Detectors and Instrumentation for Astronomy
Albert M. Fowler, Editor(s)

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