Detectors in astronomy - Infrared astronomy

Details Detectors in astronomy - Infrared astronomy Detectors in astronomy - Infrared astronomy

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.298..796y&link_type=abstract

Nature, vol. 298, Aug. 26, 1982, p. 796-798.

Astronomy and Astrophysics

Astronomy

1

Infrared Astronomy, Infrared Detectors, Quantum Efficiency, Semiconductor Devices, Signal To Noise Ratios, Bolometers, Doped Crystals, Infrared Spectrophotometers, Photoconductors, Photodiodes, Thermal Mapping

Scientific paper

The technical characteristics of infrared detectors are discussed. The mode of operation of thermal, photovoltaic, and photoconductive detectors is explained, and for each type, the noise equivalent power and quantum efficiency are assessed. The influence of doping is discussed; the Ga-doped Ge bolometer is a virtually ideal detector with almost unity quantum efficiency. At wavelengths below five microns, the most commonly used IR detector is the InSb photodiode, with quantum efficiency in excess of 60 percent under ground based conditions. Extrinsic photoconductors are currently the most sensitive detectors available for operation under reduced backgrounds.

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