Single-shot spatiotemporal measurements of high-field terahertz pulses |
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Authors: | van Tilborg J Schroeder C B Tóth Cs Geddes C G R Esarey E Leemans W P |
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Institution: | Lawrence Berkeley National Library, University of California, Berkeley, California 94720, USA. JvanTilborg@lbl.gov |
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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. |
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