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
http://web.ee.nthu.edu.tw/p/405-1175-197121,c5814.php?Lang=zh-tw
robinhuang.net 
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