Berlin 2018 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 5: Whispering Gallery Mode Resonators II

KFM 5.1: Invited Talk

Monday, March 12, 2018, 15:00–15:30, EMH 025

Whispering-gallery-like modes in two and three dimensional microcavities — •Martina Hentschel — Technische Universität Ilmenau, Institut für Physik, Weimarer Str. 25, 98693 Ilmenau

Optical microcavities and microlasers have gained a lot of interest as fascinating model systems for fundamental research and because of their high potential in nanophotonic applications. Their properties are often determined by the resonances of the cavity, i.e., its geometry. The focus of this talk will be on whispering-gallery (WG) type resonances, their dependence on the dimensionality of the system, the role of geometric phases, and the resulting far-field characteristics and application potential, e.g., in sensors.

WG-like resonances form in rotational invariant and even in non-invariant systems such as the so-called Limaçon shape. Their properties depend also on the dimensionality of the system as does the resulting emission characteristics, thereby opening new possibilities of their use in, e.g., sensing applications [1]. We also show that WG-like modes can be strongly influenced in the presence of geometric (Berry, Pancharatnam) phases, for example in the Möbius strip cavity, and how the geometric phase and polarization properties can be controlled by the cavity shape.

[1] J. Kreismann, S. Sinzinger, and M. Hentschel, Phys. Rev. A 95, 011801(R) (2017).