Regensburg 2019 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 4: Focus: Whispering-Gallery-Mode Resonators

KFM 4.10: Talk

Monday, April 1, 2019, 13:10–13:30, H47

Super-directional light emission from arrays of deformed microcavities — •Jakob Kreismann¹, Martina Hentschel¹, Arne Behrens², and Stefan Sinzinger² — ¹Institute for Physics, Theoretical Physics II/Computational Physics Group, Technische Universität Ilmenau, Germany — ²Department of Mechanical Engineering, Optical Engineering Group, Technische Universität Ilmenau, Germany

Microcavity lasers made of deformed dielectric disk resonators such as the Limaçon-shaped cavity have attracted a lot of interest due to directional light emission from high quality factor modes. Here we investigate them in various array configurations of Limaçon-shaped microcavities and show that the directional emission is enhanced drastically. At the same time, emission into side peaks is reduced. Furthermore, we study the coupling mechanisms between Limaçon-resonators arranged in different array configurations. We show that far-field properties depend strongly on the coupling between the resonators in the array that is mostly determined by the inter-cavity distance as well as geometric imperfections.