Ultrafast Optical Modulation of Second- and Third-Harmonic Generation from Cut-Disk-Based Metasurfaces

Giovanni Sartorello, Nicolas Olivier, Jingjing Zhang, Weisheng Yue, David J. Gosztola, Gary P. Wiederrecht, Grégory Wurtz, Anatoly V. Zayats

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We design and fabricate a metasurface composed of gold cut-disk resonators that exhibits a strong coherent nonlinear response. We experimentally demonstrate all-optical modulation of both second- and third-harmonic signals on a subpicosecond time scale. Pump-probe experiments and numerical models show that the observed effects are due to the ultrafast response of the electronic excitations in the metal under external illumination. These effects pave the way for the development of novel active nonlinear metasurfaces with controllable and switchable coherent nonlinear response. © 2016 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)1517-1522
Number of pages6
JournalACS Photonics
Issue number8
StatePublished - Jun 6 2016

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