A 256 X 256 pixel InSb FPA for SIRTF and other astronomical applications

Details A 256 X 256 pixel InSb FPA for SIRTF and other astronomical applications A 256 X 256 pixel InSb FPA for SIRTF and other astronomical applications

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994exa.....3..117b&link_type=abstract

Experimental Astronomy, vol. 3, no. 1-4, p. 117-118

Astronomy and Astrophysics

Astronomy

Arrays, Indium Antimonides, Infrared Detectors, Multiplexing, Photodiodes, Space Infrared Telescope Facility, Infrared Astronomy, Low Noise, Quantum Efficiency

Scientific paper

As part of the NASA Space Infrared telescope Facility (SIRTF), a low noise multiplexer has been developed. The hybridization of this multiplexer to a high indium antimonide (InSb) photodiode array has resulted in a medium wavelength infrared (MWIR) detector of outstanding performance. The multiplexer is made of a 256 x 256 array of source follower amplifiers on a 30 micrometer square pitch. Random access binary decoders are used to access each pixel of the array, allowing any read-out scheme to be implemented. Dark current has been measured at temperature ranging from 4 K to 77 K. Generation recombination currents dominate above 45 K. With 100 m V of reverse bias applied, less than 3 x 10-17 A is typical below 50 K with 8 x 10-19 A (5 e(-)/s) at 4 K. Under the same conditions 0.25 pA was measured at 77 K. Read noise has been measured as low as 186 e(-) using non-correlated techniques. Detector quantum efficiency (QE) is 50% to 80% through the entire 1 micrometer to 5 micrometer band.

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