Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 53: Poster II

HL 53.39: Poster

Mittwoch, 9. März 2016, 09:30–13:30, Poster A

Coexistence of strong and weak coupling in ZnO nanowire cavities — Tom Michalsky¹, Helena Franke¹, •Oliver Herrfurth¹, Robert Buschlinger², Ulf Peschel², Marius Grundmann¹, and Rüdiger Schmidt-Grund¹ — ¹Institut für Experimentelle Physik II, Universität Leipzig, Linnéstraße 5, D-04103 Leipzig, Germany — ²Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany

We present a high quality two dimensional cavity structure based on concentrically Bragg reflector coated ZnO nanowires acting as active material. The spatial mode distribution allows for the simultaneous appearance of the weak and strong exciton-photon coupling regime even at room temperature which is shown experimentally by photoluminescence measurements as well as reproduced by FDTD simulations. The high quality ZnO core nanowires uniquely allow for the observation of middle polariton branches between the A- and B-exciton ground state resonances in ZnO. Further, lasing emission is observed by excitation dependent PL measurements up to room temperature.