Few-particle effects in nonlinear optical spectra of semiconductor quantum dots

摘要

We present a density-matrix approach for the description of nonequilibrium carrier dynamics in optically excited semiconductor quantum dots, that explicitly accounts for exciton-exciton as well as exciton-carrier interactions. Within this framework, we analyze few-particle effects in the optical spectra and provide a ocnsistent description of additional peaks appearing at high photoexicitation density. We discuss possible applications of such optical nonlinearities in future coherent-control experiments.