Dresden 2017 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 63: Poster: Quantum Dots and Optics
HL 63.4: Poster
Wednesday, March 22, 2017, 15:00–19:00, P1A
Exceptional points in optically anisotropic microcavities — •Steffen Richter1, Tom Michalsky1, Chris Sturm1, Bernd Rosenow2, Marius Grundmann1, and Rüdiger Schmidt-Grund1 — 1Universität Leipzig, Institut für Experimentelle Physik II, Linnéstr. 5, 04103 Leipzig, Germany — 2Universität Leipzig, Institut für Theoretische Physik, Brüderstr. 16, 04103 Leipzig, Germany
Optical microcavities incorporating anisotropic media can yield effectively biaxial symmetries. They furthermore have dissipative character due to finite broadening of photonic modes. Generally, each mode with a given mode number N is split up into two modes with different polarization. We show that the optical biaxility can lead to the occurrence of exceptional points (EPs) in momentum space. At such points, not only mode energies and broadenings but also their polarization states degenerate, allowing only propagation of circularly polarized photons. Hence, the phenomenon of EPs is similar to singular optic axes in absorptive biaxial media. Here, we show how to realize EPs even in a fully transparent structure and how to tune their position in momentum space through the structure’s geometry.