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3 October 2022 Excitation of magnetic quadrupole via structured lights
Hooman Barati Sedeh, Danilo G. Pires, Nitish Chandra, Pavel D. Terekhov, Jiannan Gao, Ivan I. Kravchenko, Natalia M. Litchinitser
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Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121950M (2022) https://doi.org/10.1117/12.2635720
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
In contrast to the conventional Gaussian beams or plane waves, the interaction of structured lights with matter and meta-matter can pave the way toward novel optical effects such as exciting higher order multipolar moments or enabling nonradiating anapole states. In this work, Laguerre-Gaussian (LG) beams with various orbital angular momentum are used to excite and control the spectral location of the magnetic quadrupole modes within the all-dielectric meta-atoms. To experimentally validate this phenomenon, silicon-based meta-atoms are fabricated and illuminated by various LG beams. The experimental results are in good agreement with the theoretical predictions.
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Hooman Barati Sedeh, Danilo G. Pires, Nitish Chandra, Pavel D. Terekhov, Jiannan Gao, Ivan I. Kravchenko, and Natalia M. Litchinitser "Excitation of magnetic quadrupole via structured lights", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121950M (3 October 2022); https://doi.org/10.1117/12.2635720
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KEYWORDS
Structured light
Magnetism
Light-matter interactions
Nanostructures
Numerical simulations
Particles
Remote sensing
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