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ZnO nano-pillar Resonators with Coaxial Bragg-Reflectors

  • Rudiger Schmidt-Grund (a1), Annekatrin Hinkel (a2), Helena Hilmer (a3), Jesus Zúñiga-Pérez (a4), Chris Sturm (a5), Bernd Rheinländer (a6) and Marius Grundmann (a7)...
Abstract
Abstract

We demonstrate the growth of lateral concentric BR on ZnO nano-pillars. It opens the opportunity to be used for (i) the enhancement of the lateral confinement in classical pillar-resonators in order to increase the emission rates in the regime of weak exciton-photon coupling (Purcell-effect), (ii) to enhance the exciton-polariton coupling strength in the strong-coupling regime, and (iii) to be used for two-dimensional confinement in free-standing photonic wire resonators. Spatially resolved PL experiments in dependence on the pillar diameter and on the temperature provide strong hints for the ZnO nano-pillar resonator being in the strong-coupling regime. The coupling strength can be estimated to be V = 80 meV.

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