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Hermite-cosh-Gaussian laser-induced third harmonic generation in plasma

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Abstract

Present work focuses on Hermite-cosh-Gaussian (HchG) laser-induced third harmonic generation (THG) in plasma on account of self-focusing. HchG laser beam gets self-focused due to ponderomotive force while propagating in plasma. Interaction of intense laser pulse results ponderomotive force on electrons and induce density perturbation that produces density oscillations at second harmonic frequency. Induced density perturbation beats with quiver velocity of electrons at laser frequency to produce a third harmonic nonlinear current. Application of wiggler magnetic field satisfies the phase matching condition which results resonant THG. Significant enhancement in the efficiency of THG is observed by using HchG laser profile for mode index m = 2. Small variation in decentered parameter also affects the THG efficiency which shows the sensitivity of decentered parameter.

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Acknowledgement

This work is supported by the TARE Scheme (Grant No. TAR/2018/000916) of SERB, DST, New Delhi, India.

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Authors and Affiliations

  1. Department of Physics, Lovely Professional University, G.T. Road, Phagwara, Punjab, 144411, India

    Vinay Sharma, Vishal Thakur & Niti Kant

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  1. Vinay Sharma
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  2. Vishal Thakur
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  3. Niti Kant
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Correspondence to Niti Kant.

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Sharma, V., Thakur, V. & Kant, N. Hermite-cosh-Gaussian laser-induced third harmonic generation in plasma. Opt Quant Electron 53, 281 (2021). https://doi.org/10.1007/s11082-021-02943-7

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