Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 97: Quantum dots and wires: Pillars and cavities

HL 97.4: Talk

Friday, March 20, 2015, 10:15–10:30, ER 164

Single quantum dot lasing in the strong coupling regime — •Fabian Gericke¹, Steffen Holzinger¹, Leon Messner¹, Tobias Heindel¹, Janik Wolters¹, Andreas Löffler², Martin Kamp², Sven Höfling^2,3, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, 10623 Berlin, Germany — ²Technische Physik, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — ³Present address: School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom

Light-matter interaction of single semiconductor quantum dots coupled to optical modes of microcavities enables one to study different regimes of cavity quantum electrodynamics in solid state. Of particular interest is the coherent coupling regime which is crucial for a variety of applications in quantum information processing and for exciting effects such as single photon nonlinearities. In this contribution, we experimentally demonstrate the onset of laser oscillation in a quantum dot micropillar laser which operates in the strong coupling regime. Single quantum dot lasing effects are demonstrated within comprehensive optical studies comprising power dependent first order and second order photon autocorrelation measurements, and a comparison between axial and lateral emission of the micropillar. Our work has high potential to trigger further progress on experiments with single dot lasers, as well as their theoretical modeling.