Regensburg 2019 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 4: Focus: Whispering-Gallery-Mode Resonators

KFM 4.9: Talk

Monday, April 1, 2019, 12:50–13:10, H47

The optical Möbius strip cavity: Tailoring geometric phases and far fields — •Jakob Kreismann and Martina Hentschel — Technische Universität Ilmenau, Ilmenau, Germany

The Möbius strip, a long sheet of paper whose ends are glued together after a 180° twist, has remarkable geometric and topological properties. Here, we consider di- electric Möbius strips of finite width and investigate the interplay between geometric properties and resonant light propagation. We show how the polarization dynamics of the electromagnetic wave depends on the topological properties, and demonstrate how the geometric phase can be manipulated between 0 and π through the system geom- etry. The loss of the Moöbius character in thick cavities and for small twist segment lengths allows one to manipulate the polarization dynamics and the far-field emission, and opens the venue for applications.