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1 August 2021 Mimicking longitudinal MOKE with metasurfaces
Jon Gorecki, Thomas Frank, Oleksandr Buchnev, Gavin Stenning, Malgosia Kaczmarek, Vassili A. Fedotov
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Proceedings Volume 11795, Metamaterials, Metadevices, and Metasystems 2021; 1179526 (2021) https://doi.org/10.1117/12.2594549
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
Specular optical activity manifests itself as the rotation of light polarization when reflecting from chiral materials and diffusive scattering from chiral liquids. The effect is generally extremely weak, especially in the visible domain. Here we demonstrate strong specular optical activity at the wavelength of 660nm in achiral non-magnetic metasurfaces featuring nano-scale periodic slit patterns milled into a gold film. We reveal through experiment and simulations that the metasurfaces with reduced structural symmetry are able to induce directionally dependent polarization rotation with magnitude of ~1°, which mimics longitudinal MOKE in magnetized films.
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Jon Gorecki, Thomas Frank, Oleksandr Buchnev, Gavin Stenning, Malgosia Kaczmarek, and Vassili A. Fedotov "Mimicking longitudinal MOKE with metasurfaces", Proc. SPIE 11795, Metamaterials, Metadevices, and Metasystems 2021, 1179526 (1 August 2021); https://doi.org/10.1117/12.2594549
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KEYWORDS
Optical activity
Anisotropy
Metamaterials
Polarization
Metals
Microscopes
Microwave radiation
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