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Intense multicycle THz pulse generation from laser-produced nanoplasmas.

ABSTRACT: We present a novel scheme to obtain robust, narrowband, and tunable THz emission using a nano-dimensional overdense plasma target, irradiated by two counter-propagating detuned laser pulses. So far, no narrowband THz sources with a field strength of GV/m-level have been reported from laser-solid interaction (mostly half-or single-cycle THz pulses with only broadband frequency spectrum). From two- and three-dimensional particle-in-cell simulations, we find that the strong plasma current generated by the beat ponderomotive force in the colliding region, produces beat-frequency radiation in the THz range. Here we report intense THz pulses [Formula: see text]THz) with an unprecedentedly high peak field strength of 11.9 GV/m and spectral width [Formula: see text], which leads to a regime of an extremely bright narrowband THz source of TW/cm[Formula: see text], suitable for various ambitious applications.

SUBMITTER: Kumar M

PROVIDER: S-EPMC10015041 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature

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Intense multicycle THz pulse generation from laser-produced nanoplasmas.

Kumar Manoj M Song Hyung Seon HS Lee Jaeho J Park Dohyun D Suk Hyyong H Hur Min Sup MS

Scientific reports 20230314 1

We present a novel scheme to obtain robust, narrowband, and tunable THz emission using a nano-dimensional overdense plasma target, irradiated by two counter-propagating detuned laser pulses. So far, no narrowband THz sources with a field strength of GV/m-level have been reported from laser-solid interaction (mostly half-or single-cycle THz pulses with only broadband frequency spectrum). From two- and three-dimensional particle-in-cell simulations, we find that the strong plasma current generated ...[more]

PMID: 36918732

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