Optomagnetism in plasmonic nanostructures

Vage Karakhanyan; Clément Eustache; Yannick Lefier; Thierry Grosjean

doi:10.1117/12.2621613

24 May 2022 Optomagnetism in plasmonic nanostructures

Vage Karakhanyan, Clément Eustache, Yannick Lefier, Thierry Grosjean

Proceedings Volume PC12131, Nanophotonics IX; PC1213103 (2022) https://doi.org/10.1117/12.2621613
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Optically-induced magnetism has drawn considerable interest in the past years for its ability to speed up magnetic processes. For example, static magnetic fields have been demonstrated to be generated in non-magnetic plasmonic (gold) nanoparticles and nano-apertures. Using a simplified hydrodynamic model of the free electron gas of metal, we theoretically investigate the IFE and resulting optomagnetism in a thin gold film as well as in axis-symmetric plasmonic nanostructures under illumination with various focused light. The resulting static magnetic field is found to be maximum and dramatically confined at the corners and edges of the plasmonic structures, which reveals the ability of metallic discontinuities to concentrate and tailor static magnetic fields on the nanoscale. Plasmonics can thus generate and tune static magnetic fields on the nanoscale, potentially impacting small-scale magnetic tweezing and sensing as well as the generation of magneto-optical effects and spin-waves.

Conference Presentation

Citation Download Citation

Vage Karakhanyan, Clément Eustache, Yannick Lefier, and Thierry Grosjean "Optomagnetism in plasmonic nanostructures", Proc. SPIE PC12131, Nanophotonics IX, PC1213103 (24 May 2022); https://doi.org/10.1117/12.2621613

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