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Effect of pulse slippage on density transition-based resonant third-harmonic generation of short-pulse laser in plasma

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Abstract

The resonant third-harmonic generation of a self-focusing laser in plasma with a density transition was investigated. Because of self-focusing of the fundamental laser pulse, a transverse intensity gradient was created, which generated a plasma wave at the fundamental wave frequency. Phase matching was satisfied by using a Wiggler magnetic field, which provided additional angular momentum to the third-harmonic photon to make the process resonant. An enhancement was observed in the resonant third-harmonic generation of an intense short-pulse laser in plasma embedded with a magnetic Wiggler with a density transition. A plasma density ramp played an important role in the self-focusing, enhancing the third-harmonic generation in plasma. We also examined the effect of the Wiggler magnetic field on the pulse slippage of the third-harmonic pulse in plasma. The pulse slippage was due to the group-velocity mismatch between the fundamental and third-harmonic pulses.

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Authors and Affiliations

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

    Vishal Thakur & Niti Kant

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  1. Vishal Thakur
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  2. Niti Kant
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Correspondence to Niti Kant.

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Thakur, V., Kant, N. Effect of pulse slippage on density transition-based resonant third-harmonic generation of short-pulse laser in plasma. Front. Phys. 11, 115202 (2016). https://doi.org/10.1007/s11467-016-0563-8

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