Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 65: Quantum Dots: Optical Properties II (organized by HL)
TT 65.2: Vortrag
Mittwoch, 2. April 2014, 11:45–12:00, POT 251
cQED-controlled anticorrelation between axial and lateral emission of quantum dot - micropillar cavities — •Caspar Hopfmann1, Micha Strauß2, Christian Schneider2, Sven Höfling2,3, Martin Kamp2, Alfred Forchel2, and Stephan Reitzenstein1 — 1Institute of Solid State Physics, Technische Universität Berlin, D-10623 Berlin, Germany — 2Technische Physik, Universität Würzburg, D-97074 Würzburg, Germany — 3University of St Andrews, North Haugh, KY16 9SS United Kingdom
Cavity quantum electrodynamics (cQED) in high quality quantum dot (QD) microcavities has been subject of extensive research interest in recent years. This includes the study of fundamental cavity effects in the weak and strong coupling regime as well as their application in non-classical light sources. Here, we present an advanced optical characterization method to obtain comprehensive insight into the relevant cQED effects in QD-micropillar cavities. In contrast to conventional approaches in which the micropillar is addressed only in axial direction via its top facet, we implement additionally an in-plane excitation and detection scheme. In this unique configuration, excitation and detection capabilities are available synchronously in the axial and in-plane direction which opens up appealing opportunities for a broad study of cQED effects. For instance, it allows one to investigate the interplay between coupling emission from the QDs into resonator modes and leaky modes, respectively. Indeed, we demonstrate a cQED-controlled anti-correlation between single-QD emission through the top facet via resonator modes and emission through the side-walls via leaky modes.