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Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 48: Quantum Dots and Wires: Microcavities

HL 48.1: Vortrag

Mittwoch, 9. März 2016, 09:30–09:45, H15

Temperature-stable strong light-matter coupling in the solid state with quantum dot-micropillars — •Anna Musiał1,2, Caspar Hopfmann1, Maximillian Strauß1, Andreas M. Barth3, Martin Glässl3, Alexei Vagov3, Micha Strauß4, Christian Schneider4, Sven Höfling4,5, Martin Kamp4, Vollrath M. Axt3, and Stephan Reitzenstein11Institut für Festkörperphysik, Technische Universität Berlin, Germany — 2Faculty of Fundamental Problems of Technology, Wrocław University of Technology, Poland — 3Institut für Theoretische Physik III, Universität Bayreuth, Germany — 4Technische Physik, Universität Würzburg, Germany — 5School of Physics and Astronomy, University of St. Andrews, UK

Strong coupling (SC) regime of cQED is important for implementation of quantum networks. We address experimentally and theoretically the crucial issue of its temperature stability. Experiments and statistical analysis of temperature influence on the vacuum Rabi splitting (VRS) performed for 89 cases of SC in a broad temperature range (10*50) K revealed behavior beyond the strong confinement approximation. The unprecedented temperature stability is attributed to compensation of phonon-induced renormalization of VRS in laterally-extended In0.4Ga0.6As QDs and their unique optical properties resulting from complex electronic structure. The calculations within path integral formalism reproduces observed behavior. Observed persistence of SC demonstrates appealing possibility to counteract detrimental phonon effects.

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