Ultrashort Pulse Interaction with Intersubband Transitions of Semiconductor Quantum Wells

[摘要] We study coherent ultrashort pulse propagation in a two-subband system in a symmetric semiconductor quantum well structure, performing calculations beyond the rotating wave approximation and the slowly varying envelope approximation and taking into account the effects of electron-electron interactions. The interaction of the quantum well structure with the electromagnetic fields is studied with modified, nonlinear, Bloch equations. These equations are combined with the full-wave Maxwell equations for the study of pulse propagation. We present results for the pulse propagation and the population inversion dynamics in the quantum well structure for different electron sheet densities.

[发布机构] Physics Department, School of Natural Sciences, University of Patras, Patras; 265 04, Greece^1;Electrical Engineering Department, Technological and Educational Institute of Western Greece, Megalou Alexandrou 1, Patras; 263 34, Greece^2;Materials Science Department, School of Natural Sciences, University of Patras, Patras; 265 04, Greece^3

[效力级别] 数学

[关键词] Beyond the rotating wave approximations;Electron sheet density;Intersubband transitions;Population inversions;Pulse propagation;Quantum well structures;Slowly varying envelope approximation;Ultrashort pulse propagation