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HL: Fachverband Halbleiterphysik

HL 5: Semiconductor Lasers

HL 5.9: Vortrag

Montag, 12. März 2018, 11:45–12:00, EW 202

Controlling switching dynamics in quantum-dot micropillar lasers with time-delayed optical feedback — •Steffen Holzinger¹, Christoph Redlich², Benjamin Lingnau², Marco Schmidt¹, Martin von Helversen¹, Jörn Beyer³, Christian Schneider⁴, Martin Kamp⁴, Sven Höfling^4,5, Kathy Lüdge², Xavier Porte¹, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Germany — ²Institut für Theoretische Physik, Technische Universität Berlin, Germany — ³Physikalisch-Technische Bundesanstalt, Berlin, Germany — ⁴Technische Physik, Julius-Maximilians-Universität Würzburg, Germany — ⁵School of Physics and Astronomy, University of St Andrews, Scotland

Electrically pumped quantum-dot micropillar lasers provide a platform for the realization of delay-coupled experiments in the field of quantum optics, where single emitter effects and high spontaneous emission noise become prominent. In these structures two linear, orthogonally polarized lasing modes compete for a common gain medium, resulting in characteristic switching dynamics above the lasing threshold. We experimentally and theoretically investigate the influence of the feedback on the optical spectrum as well as the switching dynamics of the lasing modes. By directly measuring the photon number distribution with a transition edge sensor detector, we characterize the effects of feedback on the stability of the modes.