Terahertz emission mediated by ultrafast time-varying metasurfaces

J. Tunesi, L. Peters, J. S. Totero Gongora, L. Olivieri, Andrea Fratalocchi, A. Pasquazi, M. Peccianti

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Systems with ultrafast time-varying dielectric properties represent an emerging physical framework. We demonstrate here the observation of subcycle dynamics interacting directly with an electromagnetic source comprised of morphologically constrained photoexcited carriers in a surface nanostructure. A transition to a metallic metasurface state occurs on time scales faster than the terahertz-field period, inducing large nonlinear ultrafast phase shifts in the terahertz emission and exposing an interesting physical setting.
Original languageEnglish (US)
JournalPhysical Review Research
Issue number4
StatePublished - Oct 18 2021


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