Observation of localized magnetic plasmon skyrmions.

Nat Commun

Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA.

Published: January 2022

Optical skyrmions have recently been constructed by tailoring vectorial near-field distributions through the interference of multiple surface plasmon polaritons, offering promising features for advanced information processing, transport and storage. Here, we provide experimental demonstration of electromagnetic skyrmions based on magnetic localized spoof plasmons (LSP) showing large topological robustness against continuous deformations, without stringent external interference conditions. By directly measuring the spatial profile of all three vectorial magnetic fields, we reveal multiple π-twist target skyrmion configurations mapped to multi-resonant near-equidistant LSP eigenmodes. The real-space skyrmion topology is robust against deformations of the meta-structure, demonstrating flexible skyrmionic textures for arbitrary shapes. The observed magnetic LSP skyrmions pave the way to ultra-compact and robust plasmonic devices, such as flexible sensors, wearable electronics and ultra-compact antennas.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8748431PMC
http://dx.doi.org/10.1038/s41467-021-27710-wDOI Listing

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