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O: Fachverband Oberflächenphysik

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

O 43.10: Vortrag

Dienstag, 17. März 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. Akimov^1,2, Leonid V. Litvin³, Ralf Jede³, Grzegorz Karczewski⁴, Maciej Wiater⁴, Tomasz Wojtowicz⁵, Dmitri R. Yakovlev^1,2, and Manfred Bayer^1,2 — ¹Experimentelle 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.