MODEL OF THE TWO LEVEL QUANTUM DOTS ENSEMBLE INTERACTING WITH ULTRA-SHORT PULSE OF COHERENT RADIATION

摘要

Based on a model of strong coupling for two electrons that are localized inside a quantum dot characterized by only two levels of size quantization, a set of equations is derived, which allows one to describe coherent transient processes in an ensemble of isolated dots. Here one considered the case of ultrashort durations of electromagnetic field pulses, when the processes of polarization and population relaxation can be neglected. The resulting set of equations is a generalization of the Maxwell-Bloch equations, which are used in studying the processes occurring under the action of ultrashort electromagnetic pulses. The model obtained is reduced to the model of two-level atoms only if radiation is circularly polarized.