Terahertz generation from laser-driven ultrafast current propagation along a wire target

Zhuo, H. B. and Zhang, S. J. and Li, X. H. and Zhou, H. Y. and Li, X. Z. and Zou, D. B. and Yu, M. Y. and Wu, H. C. and Sheng, Z. M. and Zhou, C. T. (2017) Terahertz generation from laser-driven ultrafast current propagation along a wire target. Physical Review E, 95 (1). pp. 1-6. 013201. ISSN 2470-0053 (https://doi.org/10.1103/PhysRevE.95.013201)

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Abstract

Generation of intense coherent THz radiation by obliquely incidenting an intense laser pulse on a wire target is studied using particle-in-cell simulation. The laser-accelerated fast electrons are confined and guided along the surface of the wire, which then acts like a current-carrying line antenna and under appropriate conditions can emit electromagnetic radiation in the THz regime. For a driving laser intensity ∼3×1018W/cm2 and pulse duration ∼10 fs, a transient current above 10 KA is produced on the wire surface. The emission-cone angle of the resulting ∼0.15 mJ (∼58 GV/m peak electric field) THz radiation is ∼30°. The conversion efficiency of laser-to-THz energy is ∼0.75%. A simple analytical model that well reproduces the simulated result is presented.

ORCID iDs

Zhuo, H. B., Zhang, S. J., Li, X. H., Zhou, H. Y., Li, X. Z., Zou, D. B., Yu, M. Y., Wu, H. C., Sheng, Z. M. ORCID logoORCID: https://orcid.org/0000-0002-8823-9993 and Zhou, C. T.;
  • Item type:Article
    ID code:59832
    Dates:
    Date
    Event
    5 January 2017
    Published
    16 November 2016
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:16 Feb 2017 12:06
    Last modified:11 Nov 2024 11:38
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/59832
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