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dc.contributor.authorSchirato, Andrea
Mazzanti, Andrea
Proietti Zaccaria, Remo
Nordlander, Peter
Alabastri, Alessandro
Della Valle, Giuseppe
dc.date.accessioned 2021-03-09T15:44:33Z
dc.date.available 2021-03-09T15:44:33Z
dc.date.issued 2021
dc.identifier.citation Schirato, Andrea, Mazzanti, Andrea, Proietti Zaccaria, Remo, et al.. "All-Optically Reconfigurable Plasmonic Metagrating for Ultrafast Diffraction Management." Nano Letters, 21, no. 3 (2021) American Chemical Society: 1345-1351. https://doi.org/10.1021/acs.nanolett.0c04075.
dc.identifier.urihttps://hdl.handle.net/1911/110156
dc.description.abstract Hot-electron dynamics taking place in nanostructured materials upon irradiation with fs-laser pulses has been the subject of intensive research, leading to the emerging field of ultrafast nanophotonics. However, the most common description of nonlinear interaction with ultrashort laser pulses assumes a homogeneous spatial distribution for the photogenerated carriers. Here we theoretically show that the inhomogeneous evolution of the hot carriers at the nanoscale can disclose unprecedented opportunities for ultrafast diffraction management. In particular, we design a highly symmetric plasmonic metagrating capable of a transient symmetry breaking driven by hot electrons. The subsequent power imbalance between symmetrical diffraction orders is calculated to exceed 20% under moderate (∼2 mJ/cm2) laser fluence. Our theoretical investigation also indicates that the recovery time of the symmetric configuration can be controlled by tuning the geometry of the metaatom, and can be as fast as 2 ps for electrically connected configurations.
dc.language.iso eng
dc.publisher American Chemical Society
dc.rights This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.title All-Optically Reconfigurable Plasmonic Metagrating for Ultrafast Diffraction Management
dc.type Journal article
dc.citation.journalTitle Nano Letters
dc.contributor.org Laboratory for Nanophotonics
dc.citation.volumeNumber 21
dc.citation.issueNumber 3
dc.identifier.digital acs-nanolett-0c04075
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1021/acs.nanolett.0c04075
dc.type.publication publisher version
dc.citation.firstpage 1345
dc.citation.lastpage 1351


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