Ultrafast Broadband Dichroism by Transient Optical Symmetry Breaking in Plasmonic Metasurfaces
2020
We theoretically predict and experimentally demonstrate by polarization-resolved ultrafast transient absorption that the inhomogeneous space-time distribution of photogenerated hot carriers induces a sub-picosecond symmetry breaking in a plasmonic metasurface made of highly symmetric metaatoms.
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