Active tuning of plasmon damping via light induced magnetism (Conference Presentation)

Matthew T. Sheldon

doi:10.1117/12.2638117

3 October 2022 Active tuning of plasmon damping via light induced magnetism (Conference Presentation)

Matthew T. Sheldon

Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121950V (2022) https://doi.org/10.1117/12.2638117
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

Circularly polarized optical excitation of plasmonic nanostructures causes coherent circulating motion of their electrons, which in turn, gives rise to strong optically induced magnetization— a phenomenon known as the inverse Faraday effect (IFE). In this study we report how the IFE also significantly decreases plasmon damping. By modulating the optical polarization state incident on achiral plasmonic nanostructures from linear to circular, we observe reversible increases of reflectance by 78% as well as simultaneous increases of optical field concentration by 35.7% under 10^9 W/m2 continuous wave (CW) optical excitation. Our results outline strategies for actively modulating intrinsic losses in the metal, and thereby, the optical mode quality and field concentration via opto-magnetic effects encoded in the polarization state of incident light.

Conference Presentation

Citation Download Citation

Matthew T. Sheldon "Active tuning of plasmon damping via light induced magnetism (Conference Presentation)", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121950V (3 October 2022); https://doi.org/10.1117/12.2638117

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