MODE SUPERRADIANCE OF FREE ELECTRON-HOLE PAIRS IN SEMICONDUCTOR MAGNETOOPTICS

An efficient mode regime of recombination superradiance in semiconduct or magnetooptics, i.e., a collective spontaneous emission through inte rband recombination of free electrons and holes in a magnetized direct -gap semiconductor, is analyzed. The threshold conditions for this mod e superradiance and a nonlinear solution to the Maxwell-Bloch semicond uctor equations are found analytically for a microwave sample in any-Q Fabry-Perot cavity. It is shown that the dynamics and profile of reco mbination superradiance are different from those of usual superradianc e in a two-level medium. The limiting parameters of coherent powerful pulses of recombination superradiance and the optimal reflection facto r of an open Fabry-Perot cavity are established. Macroscopic quantum f luctuations of the delay time of spontaneously generated ultrashort pu lses are described analytically for any number of transverse modes in a semiconductor sample.