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

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

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3354..109h&link_type=abstract

Proc. SPIE Vol. 3354, p. 109-115, Infrared Astronomical Instrumentation, Albert M. Fowler; Ed.

Computer Science

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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 10(superscript 6) and 1.8 X 10(superscript 7) 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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