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

H. B. Zhuo; S. J. Zhang; X. H. Li; H. Y. Zhou; X. Z. Li; D. B. Zou; M. Y. Yu; H. C. Wu; Z. M. Sheng; C. T. Zhou

doi:10.1103/PhysRevE.95.013201

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

H. B. Zhuo, S. J. Zhang, X. H. Li, H. Y. Zhou, X. Z. Li, D. B. Zou, M. Y. Yu, H. C. Wu, Z. M. Sheng, C. T. Zhou

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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.

Original language	English
Article number	013201
Pages (from-to)	1-6
Number of pages	6
Journal	Physical Review E
Volume	95
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevE.95.013201
Publication status	Published - 5 Jan 2017

Keywords

intense coherent teraherz wave
teraherz generation
current propagation
radiated energy
wire targets

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10.1103/PhysRevE.95.013201

Zhuo-etal-PRE-2017-Terahertz-generation-from-laser-driven-ultrafast-current-propagationAccepted author manuscript, 22.3 MB

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title = "Terahertz generation from laser-driven ultrafast current propagation along a wire target",

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.",

keywords = "intense coherent teraherz wave, teraherz generation, current propagation, radiated energy, wire targets",

author = "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.}",

year = "2017",

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doi = "10.1103/PhysRevE.95.013201",

language = "English",

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AU - Zhuo, H. B.

AU - Zhang, S. J.

AU - Li, X. H.

AU - Zhou, H. Y.

AU - Li, X. Z.

AU - Zou, D. B.

AU - Yu, M. Y.

AU - Wu, H. C.

AU - Sheng, Z. M.

AU - Zhou, C. T.

PY - 2017/1/5

Y1 - 2017/1/5

N2 - 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.

AB - 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.

KW - intense coherent teraherz wave

KW - teraherz generation

KW - current propagation

KW - radiated energy

KW - wire targets

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EP - 6

JO - Physical Review E

JF - Physical Review E

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M1 - 013201

ER -

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

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