Open AccessThe single quantum dot-laser: lasing and strong coupling in the high-excitation regime
Author(s) -
Christopher Gies,
Matthias Florian,
P. Gärtner,
F. Jahnke
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.014370
Subject(s) - lasing threshold , dephasing , physics , quantum dot , spontaneous emission , excited state , exciton , resonance (particle physics) , atomic physics , quantum dot laser , stimulated emission , emission spectrum , laser , excitation , coupling (piping) , cavity quantum electrodynamics , biexciton , quantum optics , photon , quantum well , condensed matter physics , spectral line , quantum , optics , materials science , optoelectronics , quantum mechanics , open quantum system , metallurgy
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.