Dresden 2006 – scientific programme

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HL: Halbleiterphysik

HL 16: Semiconductor laser I

HL 16.8: Talk

Tuesday, March 28, 2006, 12:45–13:00, BEY 154

Theory of Nonlinear Optics in Quantum Cascade Lasers — •Carsten Weber, Fouad Banit, and Andreas Knorr — Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We investigate nonlinear optical effects, such as Rabi flopping and pump-probe signals, in quantum cascade lasers as model systems to study multisubband semiconductor heterostructures. Nonequilibrium states are formed as an interplay of the optical excitation and different scattering processes. Here, we consider the electron-phonon interaction as well as scattering at ionized doping centers, where the influence of the resonant excitation between two subbands on further subbands can be studied.