The InSb Auger recombination coefficient derived from the IR-FIR dynamicalplasma reflectivity

In order to reproduce the transient IR-FIR reflectivity and transmission du e to an intense photo-plasma generated by a fast laser pulse at a frequency above the band gap, we have used a dynamical model of plasma evolution. In this way we have derived both the `quadratic' and `cubed' coefficients of the Auger recombination in indium antimonide, by analysing the transient re flectivity at 10.6 mu and 119 mu induced by a fast Nd pulse. In particular we have derived a cubic coefficient of about 7 +/- 3 x 10(-26) cm(6) s(-1), a result larger than those derived in previous experimental works but quit e in agreement with the theory.