title: Single-shot spatiotemporal measurements of high-field terahertz pulses.
abstract: The electric field profiles of broad-bandwidth coherent terahertz (THz) pulses, emitted by laser-wakefield-accelerated electron bunches, are studied. The near-single-cycle THz pulses are measured with two single-shot techniques in the temporal and spatial domains. Spectra of 0-6 THz and peak fields up to approximately or = 0.4 MV cm(-1) are observed. The measured field substructure demonstrates the manifestation of spatiotemporal coupling at focus, which affects the interpretation of THz radiation as a bunch diagnostic and in high-field pump-probe experiments.
authors.affiliation: Lawrence Berkeley National Library, University of California, Berkeley, California 94720, USA. JvanTilborg@lbl.gov
authors.forename: J
authors.initials: J
authors.lastname: van Tilborg
authors.forename: C B
authors.initials: CB
authors.lastname: Schroeder
authors.forename: Cs
authors.initials: C
authors.lastname: Tóth
authors.forename: C G R
authors.initials: CG
authors.lastname: Geddes
authors.forename: E
authors.initials: E
authors.lastname: Esarey
authors.forename: W P
authors.initials: WP
authors.lastname: Leemans