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 Musiał^1,2, Caspar Hopfmann¹, Maximillian Strauß¹, Andreas M. Barth³, Martin Glässl³, Alexei Vagov³, Micha Strauß⁴, Christian Schneider⁴, Sven Höfling^4,5, Martin Kamp⁴, Vollrath M. Axt³, and Stephan Reitzenstein¹ — ¹Institut 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.