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  • Letter
  • Open Access

Terahertz emission mediated by ultrafast time-varying metasurfaces

J. Tunesi1,*, L. Peters1, J. S. Totero Gongora1, L. Olivieri1, A. Fratalocchi2, A. Pasquazi1, and M. Peccianti1,†

  • 1Emergent Photonics Laboratory (EPic), Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom
  • 2PRIMALIGHT, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia

  • *j.tunesi@sussex.ac.uk
  • †m.peccianti@sussex.ac.uk
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Phys. Rev. Research 3, L042006 – Published 18 October, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L042006

Abstract

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.

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  56. DOI: 10.25377/sussex.16732690.

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Phys. Rev. Research 3, L042006– Published 18 October, 2021
  • Received 16 August 2021
  • Accepted 16 September 2021
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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