Nonlinear optical properties of InSb: Hot-electron effects

At high-power densities ({} 2 MW/cm²) the temporal dependence of transmitted 10.6-{μ}m pulses in InSb shows strong pump-depletion effects. The phenomena are on a 30-nsec time scale and are interpreted as due to hot-electronic kinetics and electron-hole excitation processes. A model calculation employing rate constants from independent measurements reported in the literature yields good agreement with the experimental time evolution of the transmitted signal.