Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 25: Quantum dots: Microcavities and microlaser

HL 25.6: Vortrag

Dienstag, 17. März 2015, 10:45–11:00, EW 203

Influence of optical feedback on the characteristics of quantum dot micropillar lasers — •Steffen Holzinger¹, Elisabeth Schlottmann¹, Sören Kreinberg¹, Micha Strauß², Christian Schneider², Sven Höfling^2,3, Janik Wolters¹, Martin Kamp², and Stephan Reitzenstein¹ — ¹Technische Universität Berlin, Germany — ²Universität Würzburg, Germany — ³Present address: University of St Andrews, United Kingdom

The chaotic behavior of feedback-coupled semiconductor lasers has been so far mainly experimentally studied in the classical regime. Electrically pumped quantum dot micropillar lasers constitute an advantageous platform for the realization of feedback experiments in the quantum regime, when single photon and single emitter effects become prominent. In these structures two linear, orthogonally polarized lasing modes compete using a common gain medium, resulting in a significant difference between the output power characteristics, especially above the lasing threshold. Using an external cavity, we investigate the influence of the feedback strength and polarization on the output power, photon statistics and coherence times of the lasing modes.