Cherenkov radiation from a plasma

ORAL

Abstract

The dispersion of electromagnetic waves in a plasma has traditionally precluded the emission of Cherenkov radiation into the far field: the phase velocity of the radiation exceeds the speed of light in vacuum and therefore the speed of a conventional driver. The flying focus—a moving focal point resulting from a chirped laser pulse focused by a chromatic lens—provides an intensity peak that can travel at superluminal velocities. Theory and simulations show that a plasma ponderomotively excited by a flying focus pulse can emit far-field Cherenkov radiation at THz frequencies.

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Presenters

  • John P. Palastro

    University of Rochester Laboratory for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester

Authors

  • John P. Palastro

    University of Rochester Laboratory for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester

  • Thomas M Antonsen

    Univ of Maryland-College Park

  • Arnaud Colaitis

    Laboratory for Laser Energetics, U. of Rochester, University of Rochester Laboratory for Laser Energetics

  • Russell Follett

    Univ of Rochester, Laboratory for Laser Energetics, U. of Rochester, University of Rochester Laboratory for Laser Energetics, University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • David Turnbull

    University of Rochester Laboratory for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Jorge M Vieira

    ISCTE - Inst Universitario Lisboa, Instituto Superior Técnico, Lisbon, Portugal, GoLP/Instituto Superior Tecnico, Inst Superior Tecnico (IST), GoLP/IPFN Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal, Instituto de Plasmas e Fusão Nuclear-Laboratório Associado, Inst Superior Tecnico (IST), Inst Superior Tecnico (IST)

  • Dustin H Froula

    University of Rochester Laboratory for Laser Energetics, Univ of Rochester, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics, Laboratory for Laser Energetics, University of Rochester, University of Rochester