Abstract

Luminescence spectra of excitonic molecules in CuCl resonantly created by nano-second dye laser excitation are measured at 4.2 K changing the lenghts of the excited region. The spectra are dominated by stimulated emission. The gain coefficient for the M T line is saturated more easily than that for M L , though the former is larger under unsaturated conditions. These gain characteristics explain well various stimulated emission effects observed.

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