Electronic spectral densities in quantum dots

Abstract

The spectral line profiles of the luminescence transitions in individual quantum dots have been studied both theoretically and experimentally in the recent years. In these works the spectral line profiles have been shown to be clearly different from the simple form of a broadened delta function of frequency variable. In the present work we turn attention to these earlier measurements and calculations and compare them with the electronic spectral line profiles in individual quantum dots calculated under the assumption of quantum dot electrons multiple scattering on the longitudinal optical phonons. The calculated luminescence spectral line profiles of the optical transition will be expressed with help of the electronic spectral densities dependent on the electronic statistical distribution, as it develops in the course of the relaxation processes or other kinetic processes in quantum dots.