Abstract

Transient luminescence behavior of excitonic molecules in CuCl is studied at 4.2 K with a time resolution of ∼ 10 ps. The lifetime of the excitonic molecule state is determined to be several hundred pico-seconds. The spectral shape and the time characteristics of the luminescence intensity depend on excitation wavelength and also on the direction of observation. This is explained by the effect of the stimulated emission process.

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