All-Optically Reconfigurable Plasmonic Metagrating for Ultrafast Diffraction Management

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dc.citation.firstpage1345
dc.citation.issueNumber3
dc.citation.journalTitleNano Letters
dc.citation.lastpage1351
dc.citation.volumeNumber21
dc.contributor.authorSchirato, Andrea
dc.contributor.authorMazzanti, Andrea
dc.contributor.authorProietti Zaccaria, Remo
dc.contributor.authorNordlander, Peter
dc.contributor.authorAlabastri, Alessandro
dc.contributor.authorDella Valle, Giuseppe
dc.contributor.orgLaboratory for Nanophotonics
dc.date.accessioned2021-03-09T15:44:33Z
dc.date.available2021-03-09T15:44:33Z
dc.date.issued2021
dc.description.abstractHot-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.identifier.citationSchirato, Andrea, Mazzanti, Andrea, Proietti Zaccaria, Remo, et al.. "All-Optically Reconfigurable Plasmonic Metagrating for Ultrafast Diffraction Management." <i>Nano Letters,</i> 21, no. 3 (2021) American Chemical Society: 1345-1351. https://doi.org/10.1021/acs.nanolett.0c04075.
dc.identifier.digitalacs-nanolett-0c04075
dc.identifier.doihttps://doi.org/10.1021/acs.nanolett.0c04075
dc.identifier.urihttps://hdl.handle.net/1911/110156
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.rightsThis 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.titleAll-Optically Reconfigurable Plasmonic Metagrating for Ultrafast Diffraction Management
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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