All-Optical Reconfiguration of Ultrafast Dichroism in Gold Metasurfaces

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dc.citation.articleNumber2102549
dc.citation.issueNumber10
dc.citation.journalTitleAdvanced Optical Materials
dc.citation.volumeNumber10
dc.contributor.authorSchirato, Andrea
dc.contributor.authorToma, Andrea
dc.contributor.authorProietti Zaccaria, Remo
dc.contributor.authorAlabastri, Alessandro
dc.contributor.authorCerullo, Giulio
dc.contributor.authorDella Valle, Giuseppe
dc.contributor.authorMaiuri, Margherita
dc.date.accessioned2022-06-08T15:58:48Z
dc.date.available2022-06-08T15:58:48Z
dc.date.issued2022
dc.description.abstractOptical metasurfaces have come into the spotlight as a promising platform for light manipulation at the nanoscale, including ultrafast all-optical control via excitation with femtosecond laser pulses. Recently, dichroic metasurfaces have been exploited to modulate the polarization state of light with unprecedented speed. This work theoretically predicts and experimentally demonstrates by pump–probe spectroscopy the capability to reconfigure the ultrafast dichroic signal of a gold metasurface by simply acting on the polarization of the pump pulse, which is shown to reshape the spatio-temporal distribution of the optical perturbation. The photoinduced anisotropic response, driven by out-of-equilibrium carriers and extinguished in a sub-picosecond temporal window, is readily controlled in intensity by tuning the polarization direction of the excitation up to a full sign reversal. Hence, nonlinear metasurfaces are here demonstrated to offer the flexibility to tailor their ultrafast optical response in a fully all-optically reconfigurable platform.
dc.identifier.citationSchirato, Andrea, Toma, Andrea, Proietti Zaccaria, Remo, et al.. "All-Optical Reconfiguration of Ultrafast Dichroism in Gold Metasurfaces." <i>Advanced Optical Materials,</i> 10, no. 10 (2022) Wiley: https://doi.org/10.1002/adom.202102549.
dc.identifier.digital2022-Schirato
dc.identifier.doihttps://doi.org/10.1002/adom.202102549
dc.identifier.urihttps://hdl.handle.net/1911/112446
dc.language.isoeng
dc.publisherWiley
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleAll-Optical Reconfiguration of Ultrafast Dichroism in Gold Metasurfaces
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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