LADDER STRUCTURE IN THE TIME-DOMAIN RESPONSE OF LANDAU-LEVELS TO A SHOCK ELECTROMAGNETIC PULSE

Step-like profiles are predicted for the time-domain response of a qua si-two-dimensional system of equidistant levels subjected to resonant excitation by a strongly asymmetric light pulse with a sharp front. Ou t-of-resonance excitation results in peculiar traces whose forms depen d on the detuning from resonance. The structure visibility is a functi on of the broadening parameters for incident light and electronic exci tations. The radiative broadening of Landau electron-hole pairs has be en calculated and shown to be proportional to the magnetic field stren gth. (C) 1998 Published by Elsevier Science B.V.