Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 10: Semiconductor Lasers I

HL 10.5: Vortrag

Montag, 20. März 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 Höfling^{3, 4}, and Stephan Reitzenstein¹ — ¹Institut 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.