Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Laser Development: Nonlinear Effects

Q 40.6: Vortrag

Mittwoch, 25. März 2015, 12:15–12:30, K/HS2

Feedback coupling of quantum dot microlasers — •Janik Wolters¹, Leon Messner¹, Elisabeth Schlottmann¹, Sören Kreinberg¹, Steffen Holzinger¹, Christian Schneider², Sven Höfling^2,3, Martin Kamp², and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — ²Technische Physik, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Würzburg, Germany — ³Present address: SUPA, School of Physics and Astronomy, University of St Andrews, United Kingdom

Semiconductor micropillar cavities with a few tens of embedded quantum dots under time delayed optical feedback are ideal to study the transition from semiclassical to quantum mechanical nonlinear systems. In addition, these structures are expected to have manifold applications, e.g. in cryptography or high bit-rate random number generation.

We established a way to maximize the incoherent optical feedback of nanophotonic systems while leaving options to change phase, polarization and feedback rate. In our experiments, we observe feedback-induced changes, mainly in the second order autocorrelation function of the emitted light and the input-ouptut characteristics.

Our results pave the way to further studies of nonlinear laser dynamics beyond the Lang-Kobayashi model, towards the quantum regime.