Abstract
A theory of coherent control of spontaneous secondary emission of semiconductor quantum dots resonantly excited by two phase-locked laser pulse trains has been developed. We have considered quasi-elastic, optical-phonon assisted, and thermalized components of the emission with respect to a study of elementary excitation dynamics. The analysis of the time-integrated signal of the emission depending on a mutual delay between the pulses has shown that the coherent control technique is promising in the determination of dephasing rates of resonant optical transitions for both a single quantum dot and an ensemble of dots with a large inhomogeneous broadening. The role of the signal spectral selection for reliable determination of the dephasing rates has been clarified.
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