title: The single quantum dot-laser: lasing and strong coupling in the high-excitation regime.
abstract: The emission properties of a single quantum dot in a microcavity are studied on the basis of a semiconductor model. As a function of the pump rate of the system we investigate the onset of stimulated emission, the possibility to realize stimulated emission in the strong-coupling regime, as well as the excitation-dependent changes of the photon statistics and the emission spectrum. The role of possible excited charged and multi-exciton states, the different sources of dephasing for various quantum-dot transitions, and the influence of background emission into the cavity mode are analyzed in detail. In the strong coupling regime, the emission spectrum can contain a line at the cavity resonance in addition to the vacuum doublet caused by off-resonant transitions of the same quantum dot. If strong coupling persists in the regime of stimulated emission, the emission spectrum near the cavity resonance additionally grows due to broadened contributions from higher rungs of the Jaynes-Cummings ladder.
authors.affiliation: Institute for Theoretical Physics, University of Bremen, 28334 Bremen, Germany. gies@itp.uni-bremen.de
authors.forename: Christopher
authors.initials: C
authors.lastname: Gies
authors.forename: Matthias
authors.initials: M
authors.lastname: Florian
authors.forename: Paul
authors.initials: P
authors.lastname: Gartner
authors.forename: Frank
authors.initials: F
authors.lastname: Jahnke