Computation of the coherence time of quantum‐dot microcavity lasers including photon–carrier and photon–photon correlations

Abstract

Microcavity lasers with semiconductor quantum dots as active material have attracted considerable attention recently. We present a theoretical study of the first-order coherence of such novel light sources. The correlation function g ð1Þ ðtÞ and the corresponding coherence time are computed including photoncarrier and photon-photon correlations with respect to the delay time t up to the quadruplet level of the cluster expansion scheme. A comparison of the different levels of the cluster expansion is provided.