Nature: the birth of plasmonic meron

Using time-resolved two-photon photoemission electron microscopy (PEEM), we experimentally recorded attosecond videos revealing evanescent vortex creations in a chiral plasmonic device even under linearly-polarized optical excitation. Moreover, the resulting vortex fields generate topological quasiparticles at the metal surface similar to magnetic skyrmions. We discover the stable creation of three plasmonic merons at the vortex core in the nano-femto scale.

https://doi.org/10.1038/s41586-020-3030-1

Dhruv’s Laser & Photonics Reviews paper

A simple plasmonic nanostructure is designed to allow polarization‐sensitive directional steering of surface plasmon polaritons (SPPs). Based on crossed Babinet‐inverted nanoantennas, steering of SPPs in the full first quadrant with high sensitivity to the linear polarization of the monochromatic exciting source is numerically and experimentally demonstrated. The same device could also function as a polarization‐driven power‐splitter.

https://doi.org/10.1002/lpor.202000076

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