Abstract
A study was made of stimulated emission of radiation and lasing in zinc selenide single crystals subjected to a transverse streamer discharge (T = 294 and 77 K). The stimulated radiation observed in the 448–449 nm range at 77 K was attributed to radiative recombination in a dense exciton gas, whereas that observed at room temperature originated from an electron–hole plasma. The threshold density of nonequilibrium carriers needed for the generation of light at 77 K did not exceed 1018 cm−3 .
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