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Highly efficient generation of GV/m-level terahertz pulses from intense femtosecond laser-foil interactions.

ABSTRACT: The terahertz radiation from ultraintense laser-produced plasmas has aroused increasing attention recently as a promising approach toward strong terahertz sources. Here, we present the highly efficient production of millijoule-level terahertz pulses, from the rear side of a metal foil irradiated by a 10-TW femtosecond laser pulse. By characterizing the terahertz and electron emission in combination with particle-in-cell simulations, the physical reasons behind the efficient terahertz generation are discussed. The resulting focused terahertz electric field strength reaches over 2 GV/m, which is justified by experiments on terahertz strong-field-driven nonlinearity in semiconductors.

SUBMITTER: Lei HY

PROVIDER: S-EPMC9118729 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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Highly efficient generation of GV/m-level terahertz pulses from intense femtosecond laser-foil interactions.

Lei Hong-Yi HY Sun Fang-Zheng FZ Wang Tian-Ze TZ Chen Hao H Wang Dan D Wei Yan-Yu YY Ma Jing-Long JL Liao Guo-Qian GQ Li Yu-Tong YT

iScience 20220430 5

The terahertz radiation from ultraintense laser-produced plasmas has aroused increasing attention recently as a promising approach toward strong terahertz sources. Here, we present the highly efficient production of millijoule-level terahertz pulses, from the rear side of a metal foil irradiated by a 10-TW femtosecond laser pulse. By characterizing the terahertz and electron emission in combination with particle-in-cell simulations, the physical reasons behind the efficient terahertz generation ...[more]

PMID: 35602940

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