Blocked impurity band hybrid infrared focal plane arrays for astronomy

Details Blocked impurity band hybrid infrared focal plane arrays for astronomy Blocked impurity band hybrid infrared focal plane arrays for astronomy

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989itns...36..857r&link_type=abstract

(IEEE, DOE, NIST, et al., 1988 Nuclear Science Symposium, Orlando, FL, Nov. 9-11, 1988) IEEE Transactions on Nuclear Science (IS

Astronomy and Astrophysics

Astronomy

13

Focal Plane Devices, Infrared Detectors, Spaceborne Astronomy, Field Effect Transistors, Photometers, Quantum Efficiency, Radiation Tolerance

Scientific paper

High-performance infrared hybrid focal plane arrays using 10- x 50-element Si:As blocked-impurity-band (BIB) detectors (cutoff wavelength = 28 microns) and matching switched MOSFET multiplexers have been developed and characterized for space astronomy. Use of impurity-band-conduction technology provides detectors which are nuclear-radiation-hard and free of the many anomalies associated with conventional silicon photoconductive detectors. Emphasis in the present work is on recent advances in detector material quality which have led to significantly improved detector and hybrid characteristics. Results demonstrating increased quantum efficiency (particularly at short-wavelength infrared), obtained by varying the BIB detector properties (infrared active layer thickness and arsenic doping profile), are summarized. Measured read noise and dark current for different temperatures are reported. The hybrid array performance achieved demonstrates that BIB detectors are well suited for use in astronomical instrumentation.

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