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

doi:10.1007/s11467-016-0563-8

Front. Phys.

2016, Vol. 11

Issue (4) : 115202 https://doi.org/10.1007/s11467-016-0563-8

RESEARCH ARTICLE

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

Vishal Thakur,Niti Kant(

)

Department of Physics, Lovely Professional University, Phagwara-144411, Punjab, India

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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.

Keywords short pulse laser pulse slippage third harmonic generation plasma

Corresponding Author(s): Niti Kant

Online First Date: 17 March 2016 Issue Date: 08 June 2016

Cite this article:

Vishal Thakur,Niti Kant. Effect of pulse slippage on density transition-based resonant third-harmonic generation of short-pulse laser in plasma[J]. Front. Phys. , 2016, 11(4): 115202.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-016-0563-8
https://academic.hep.com.cn/fop/EN/Y2016/V11/I4/115202

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