Room-temperature excitonic optical nonlinearities of molecular beam epitaxially grown ZnSe thin films

Peyghambarian, N.; Park, S. H.; Koch, S. W.; Jeffery, A.; Potts, J. E.; Cheng, H.
January 1988
Applied Physics Letters;1/18/1988, Vol. 52 Issue 3, p182
Academic Journal
Large optical nonlinearities have been observed in molecular beam epitaxially grown thin films of ZnSe at room temperature and at T=150 K. A comparison with a plasma theory indicates that in both cases exciton screening is the dominating mechanism for the nonlinearity. The maximum nonlinear index per excited electron-hole pair at room temperature is comparable to that of bulk GaAs and GaAs-AlGaAs multiple quantum wells. The measured absorption and nonlinear index spectra agree quite well with our calculated values.


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