Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 107: Microcavities, polaritons and condensates

HL 107.7: Talk

Friday, March 20, 2015, 12:00–12:15, EW 015

Strong light-matter interaction in ZnO nanowires concentrically coated with Bragg reflectors — •Tom Michalsky, Helena Franke, Rüdiger Schmidt-Grund, and Marius Grundmann — Universität Leipzig, Institut für Experimentelle Physik II, Linnéstraße 5, 04103 Leipzig

In this work we present the investigation of the optical and structural properties of ZnO nanowires concentrically coated with distributed Bragg reflectors. The whole structure was grown by pulsed laser deposition. Scanning electron microscope images reveal excellent structural and interface quality. Angularly and spatially resolved microphotoluminescence (PL) and reflectivity spectra prove lateral confinement and strong exciton-photon coupling even at room temperature. With increasing PL excitation density we observe a controlled transition from the strong to the weak coupling regime as evidenced by stimulated emission out of the uncoupled resonator modes.