Berlin 2015 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 28: Nonlinear Dynamics, Synchronization and Chaos - Part I

DY 28.7: Talk

Wednesday, March 18, 2015, 11:15–11:30, BH-N 128

Nonlinear effects in semiconductor quantum dot microlasers — •Elisabeth Schlottmann¹, Steffen Holzinger¹, Sören Kreinberg¹, Leon Meßner¹, Christian Schneider², Sven Höfling^2,3, Martin Kamp², Janik Wolters¹, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — ²Technische Physik, Universität Würzburg, W, Germany — ³Present address: SUPA, School of Physics and Astronomy, University of St Andrews, United Kingdom

Semiconductor microlasers with a few tens of quantum dots in the active layer exhibit ultra-low laser thresholds in the semiclassical limit, while showing genuine quantum effects below threshold. Today, it is well known that classical lasers under optical feedback or external injection posess highly non-linear behavior. However, the transition from classical to quantum chaos is hardly understood.

In our experiments we investigate non-linear effects in InGaAs/GaAs quantum dot micropillar lasers, aiming to expand the semiclassical Lang-Kobayashi physics to the quantum regime. To this end, we measured the influence of time-delayed feedback from a 2 m long external cavity on the first and second order autocorrelation of the emitted radiation. With external injection of low intensity laser light, we pave the way for external quantum control of microlasers.