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Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 10: Semiconductor Lasers I

HL 10.5: Talk

Monday, March 20, 2017, 10:30–10:45, POT 06

Quantum dot micropillar lasers subject to time-delayed optical feedback — •Steffen Holzinger1, Xavier Porte1, Benjamin Lingnau2, Kathy Lüdge2, Christian Schneider3, Martin Kamp3, Sven Höfling3, 4, and Stephan Reitzenstein11Institut für Festkörperphysik, Technische Universität Berlin, Germany — 2Institut für Theoretische Physik, Technische Universität Berlin, Germany — 3Technische Physik, Julius-Maximilians-Universität Würzburg, Germany — 4School of Physics and Astronomy, University of St Andrews, Scotland

The chaotic dynamics of feedback-coupled semiconductor lasers have been so far mainly experimentally studied in the classical regime. Electrically pumped quantum dot micropillar lasers provide an advantageous platform for the realization of feedback experiments in the regime of few photons, 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. Using an external cavity, we experimentally and theoretically investigate the influence of the feedback strength, external cavity length and polarization on the optical spectrum as well as the switching dynamics of the lasing modes.

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