Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 77: Poster: Plasmonics and Nanooptics
O 77.25: Poster
Mittwoch, 14. März 2018, 18:15–20:30, Poster A
On the resonances of an optical microcavity based on a hyperbolic metamaterial — •Thomas Kiel1, Evgenij Travkin1, Sergey Sadofev1, Oliver Benson1, Sascha Kalusniak1, and Kurt Busch1,2 — 1Humboldt-Universität zu Berlin, Institut für Physik, Newtonstr. 15, 12489 Berlin — 2Max-Born-Institut, Max-Born-Str. 2A, 12489 Berlin
Metamaterials provide a rich variety of physical effects such as phase and group velocity control and negative refraction. Here, we present unusual resonance effects of a microcavity filled with a hyperbolic metamaterial (HMM). The HMM is based on pairs of stacked layers of epitaxially grown ZnO / ZnO:Ga.
We compare the experimental reflection spectra with numerical computations using the scattering-matrix algorithm. With the computation of the resonance states, a.k.a. quasi-normal modes, we gain a deeper understanding in the emergence of the cavities’ resonances. We identify the different modes supported by computing their field distributions. Furthermore we can map out the modes’ dispersion relation in good agreement with the experimental angular-resolved spectra. The tuning of the layer thicknesses and doping level of the HMM core allows us to tailor the modes of the system.