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DY: Fachverband Dynamik und Statistische Physik

DY 43: Nonlinear Dynamics, Synchronizsation and Chaos

DY 43.6: Vortrag

Donnerstag, 23. März 2017, 10:45–11:00, ZEU 118

Synchronization of mutually coupled quantum dot high-Q micropillar lasers — •Sören Kreinberg¹, Felix Krüger¹, Steffen Holzinger¹, Elisabeth Schlottmann¹, Martin Kamp², Christian Schneider², Sven Höfling^2,3, Xavier Porte¹, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Germany — ²Technische Physik, Julius-Maximilians-Universität Würzburg, Germany — ³School of Physics and Astronomy, University of St Andrews, Scotland

Mutual coupling and synchronization of semiconductor lasers is an exciting topic in the field of non-linear dynamics with potential applications to secure data communication. In this work, we aim at pushing the phenomenon of synchronization towards the quantum regime of cavity enhanced microlasers. We address this novel regime by experimental studies on mutually coupled quantum dot microcavity lasers with sub-µ W emission power.

The structures under study are electrically driven GaAs/AlAs micropillar cavities containing a single layer of In-GaAs quantum dots (QD) as active medium. In contrast to conventional macroscopic lasers, these high-β microcavity lasers exhibit a strong influence of spontaneous emission on their dynamics. In the field of non-linear dynamics, this peculiarity leads to the effect of partial injection locking as was recently demonstrated [1]. We investigate the pump-dependent detuning range of phase locking, frequency pulling and partial locking, as well as the existence of mutually correlated chaotic intensity fluctuations. [1] E. Schlottmann et al., Phys. Rev. Applied 6, 044023 (2016)