Detector and imager of IR radiation using IR quenching of visible radiation in crystals at room temperature

Details Detector and imager of IR radiation using IR quenching of visible radiation in crystals at room temperature Detector and imager of IR radiation using IR quenching of visible radiation in crystals at room temperature

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2225..109v&link_type=abstract

Proc. SPIE Vol. 2225, p. 109-116, Infrared Detectors and Focal Plane Arrays III, Eustace L. Dereniak; Robert E. Sampson; Eds.

Computer Science

Scientific paper

In this paper there are investigated both theoretically and experimentally the possibility of high-sensitive detection and visualization of IR radiation in direct-gap semiconductor crystals due to IR quenching effect for probe visible radiation in the region of relative transparency of the crystal. This comparison allows us to conclude that the IR quenching effect observed by us in CdS crystal is probably the absorption of probe photon with energy deficit with respect to excitonic resonance, which is taken off due to exchange interaction of free exciton (Wannier-Mott type) in an intermediate state with spherical excitons that are localized at many electron impurity atoms.

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