Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 70: Semiconductor Lasers I

HL 70.5: Vortrag

Donnerstag, 10. März 2016, 10:30–10:45, H13

Effects of single-quantum-dot lasing in the presence of strong coupling — Fabian Gericke¹, Leon Meßner¹, Steffen Holzinger¹, Caspar Hopfmann¹, Tobias Heindel¹, Janik Wolters¹, Matthias Florian², Frank Jahnke², Christian Schneider³, Martin Kamp³, Sven Höfling³, •Christopher Gies², and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin — ²Institut für Theoretische Physik, Universität Bremen — ³Technische Physik, Universität Würzburg, Germany

Nanolasers with only few self-assembled semiconductor quantum dots (QDs) as active medium push solid-state emitter cavity-QED into new operational regimes, where the definition of 'lasing' needs to be closely reexamined. We present insight and results from a theory/experiment collaboration to explore the possibility of lasing in a system that exhibits strong coupling between a single emitter and a high-Q cavity mode. The coupling of higher multi-exciton states of detuned QD emitters is considered as a cavity feeding mechanism in a microscopic theory that treats the light-matter interaction of the few-emitter system non-pertubatively. We demonstrate that strong coupling and lasing can coexist in the experiment, and that the onset of stimulated emission already causes a transition to a single peak in the emission spectrum before strong coupling is lost due to increasing excitation-induced dephasing.