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MA: Fachverband Magnetismus
MA 47: Poster III
MA 47.3: Poster
Thursday, March 21, 2024, 15:00–18:00, Poster D
Magneto-Plasmonic Quasicrystal structure for Broadband Faraday Rotation Enhancement — •Shraddha Choudhary1,2, Gajendra Mulay1, and Venu Gopal Achanta1 — 1Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005, India. — 2Institute of Physics, University of Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
Magneto-plasmonic nanostructures integrating plasmonics and magneto-optics offer a novel way of controlling light using magnetic fields. The Faraday effect in magneto-optical materials causes a rotation of the polarization plane of light, which is primarily utilized in non-reciprocal photonic devices such as optical isolators and circulators. However, existing magneto-optical materials exhibit a weak Faraday effect in the visible to the near-infrared frequency range, resulting in bulky Faraday isolators. In this study, we report a broadband enhancement in the Faraday rotation in a plasmonic quasicrystal (PIQC) structure comprising of patterned gold pillars on top of ferromagnetic thin films. The enhancement primarily results from the excitation of surface plasmon polaritons that propagate at the interface between gold and garnet in the PIQC structure.
Keywords: Plasmonic Quasicrystal Structure; Surface Plasmon Polariton; Yttrium Iron Garnet; Faraday Rotation; Finite Difference Time Domain