Studies of intensity-dependent transmission of pulsed radiation of nanosecond duration at 10.6 μm very near the band gap in n-Hg0.77Cd0.23Te at low temperatures show evidence of abrupt limiting behavior which manifests itself in no additional transmission for incident intensities exceeding approximately 200 kW/cm2 at T⩽20 K. Measurement of the spectral broadening in the transmitted radiation for excitation of nanosecond duration suggest that such self-enhanced ’’opacity’’ can be switched on in less than 500 psec. The surprisingly low observed threshold intensities are considered by examining the contribution from inelastic hot-electron collisions to the generation of excess free carriers.
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Jamison et al. (1978) studied this question.
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