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Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

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O: Fachverband Oberflächenphysik

O 43: Plasmonics and Nanooptics III: Periodic Structures and Theory

O 43.10: Talk

Tuesday, March 17, 2020, 12:45–13:00, WIL A317

Photonic wheels and magnetic field induced directional emission of excitons — •Lars Klompmaker1, Felix Spitzer1, Alexander N. Poddubny2, Ilya A. Akimov1,2, Leonid V. Litvin3, Ralf Jede3, Grzegorz Karczewski4, Maciej Wiater4, Tomasz Wojtowicz5, Dmitri R. Yakovlev1,2, and Manfred Bayer1,21Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany — 2Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia — 3Raith GmbH, 44263 Dortmund, Germany — 4Institute of Physics, Polish Academy of Sciences, PL-02668 Warsaw, Poland — 5International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, PL-02668 Warsaw, Poland

Photonic wheels carry transverse spin, which is locked to the propagation direction of the electromagnetic wave. Therefore, photonic wheels are attractive for spin manipulation and read-out in magnetic media. Emission effects are of particular interest. In this work emission phenomena are discussed where directionality is established perpendicular to an externally applied magnetic field for light sources (excitons) located near a surface, breaking the mirror symmetry. In hybrid plasmonic semiconductor structures, we observe a significantly enhanced directionality of up to 60%. The directional emission is studied regarding period dependence of the plasmonic grating and different emission geometries are considered.

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