Ultrafast relaxation of optically excited nonequilibrium electron-hole distributions in germanium
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abstract
New measurements of the nonlinear, nonequilibrium optical (1.06m) properties of the germanium solid-state plasma are presented. Single pulse transmission has been measured as a function of incident pulse energy at sample temperatures of 105 K and 297 K. In addition the relative transmission of a probe pulse as a function of time delay after an excitation pulse has been measured for three different excitation pulse energies and two temperatures. A model which explains the observed behavior of germanium under intense radiation is briefly, qualitatively described, and theorectical curves are plotted with the experimental data. 1976.