Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 77: Poster: Plasmonics and Nanooptics

O 77.15: Poster

Mittwoch, 14. März 2018, 18:15–20:30, Poster A

Simulations of the magneto-plasmonic response of hybrid Bi-YIG/Au nanostructures — •Philipp Lang, Spiridon D. Pappas, and Evangelos Th. Papaioannou — Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Germany

The strong localization of light, which can be induced by surface plasmons, enhances the magneto-optical response of ferromagnetic materials [1]. In this work, we simulated the magneto-optical response of bismuth substituted yttrium iron garnet (Bi-YIG) thin films containing gold nanoparticles (AuNPs) with the aid of the simulation Software CST STUDIO. Specifically, the longitudinal magneto-optical Kerr effect (L-MOKE) has been simulated from the orthogonal components of the radiated electric field in the far field region and the results have been compared with the experimental. In order to explain the trend of the anomalous Kerr effect, which is attributed to the localization of the electric field by the AuNPs, the Near Field enhancement has been calculated and correlated to the Far Field results. The Near and Far field simulations have been performed by using unit cell boundary conditions for different angles, as well as for different wavelengths of the incident light.

[1] M. Rollinger et al., Nano Lett. 16, 2432 (2016).