Mid- and far-infrared hybrid focal plane arrays for astronomy

Terry L. Herter; Thomas L. Hayward; James R. Houck; David H. Seib; Wen N. Lin

doi:10.1117/12.317231

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21 August 1998 Mid- and far-infrared hybrid focal plane arrays for astronomy

Terry L. Herter, Thomas L. Hayward, James R. Houck, David H. Seib, Wen N. Lin

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Proceedings Volume 3354, Infrared Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.317231
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

High performance 128 X 128 Si:As and Si:Sb blocked- impurity-band hybrid arrays have been developed for ground- based and airborne astronomy. These devices cover the 5-25 (Si:As) and 15-40 micrometers (Si:Sb) portions of the spectrum. The peak detective quantum efficiencies quantum efficiencies exceed 50 percent for Si:As and 30 percent for Si:Sb. An anti-reflection coat is used to increase responsivity and to reduce internal reflections for the Si:As detectors. The multiplexer yields a linear output response vs. integrated charge. A special design feature of the multiplexer is a changeable nodal capacitance that allows dynamic switching of the well depth between 1.8 X 10⁶ and 1.8 X 10⁷ electrons. The single-sample read noises for the two states are approximately 75 and approximately 760 electrons respectively. These devices have been used successfully to perform astronomical observations in a number of instruments.

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Terry L. Herter, Thomas L. Hayward, James R. Houck, David H. Seib, and Wen N. Lin "Mid- and far-infrared hybrid focal plane arrays for astronomy", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); https://doi.org/10.1117/12.317231

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