A few-emitter solid-state multi-exciton laser.

ABSTRACT: We report on non-conventional lasing in a photonic-crystal nanocavity that operates with only four solid-state quantum-dot emitters. In a comparison between microscopic theory and experiment, we demonstrate that irrespective of emitter detuning, lasing with [Formula: see text] is facilitated by means of emission from dense-lying multi-exciton states. In the spontaneous-emission regime we find signatures for radiative coupling between the quantum dots. The realization of different multi-exciton states at different excitation powers and the presence of electronic inter-emitter correlations are reflected in a pump-rate dependence of the ?-factor.

SUBMITTER: Lichtmannecker S 

PROVIDER: S-EPMC5547160 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature