Cathodoluminescence, gain, and stimulated emission in electron-beam-pumped ZnCdSe

Cathodoluminescence and lasing properties of ZnCdSe were studied over a wide range of temperatures and excitation conditions in a demountable CRT. Lasing was obtained in the range of wavelengths from yellow to red. Based on the results of the experiments, gain and absorption spectra under different conditions were calculated. The band-gap dependence on excitation density was studied and the results offered an explanation for the differences between dependencies of the threshold-excitation densities on penetration depth at different temperatures.