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Second-harmonic generation by a chirped laser pulse with the exponential density ramp profile in the presence of a planar magnetostatic wiggler

Published online by Cambridge University Press:  16 December 2019

Niti Kant
Department of Physics, Lovely Professional University, G.T. Road, Phagwara144411, Punjab, India
Arvinder Singh
Department of Physics, NIT Jalandhar, Jalandhar144 011, Punjab, India
Vishal Thakur*
Department of Physics, Lovely Professional University, G.T. Road, Phagwara144411, Punjab, India
Author for correspondence: Vishal Thakur, Department of Physics, Lovely Professional University, G.T. Road, Phagwara144411, Punjab, India. E-mail:


Second-harmonic generation of the relativistic self-focused chirped laser pulse in plasma has been studied with the exponential plasma density ramp profile in the presence of a planar magnetostatic wiggler. It is evident that the exponential plasma density ramp is helpful in enhancing second-harmonic generation as, with the introduction of the exponential plasma density ramp, self-focusing becomes stronger and hence, it leads to enhance the harmonic generation of the second order in the plasma. Also, it is observed that the efficiency of second-harmonic generation enhances significantly with an increase in the value of the chirp parameter. Further, the magnetostatic wiggler helps in enhancing the harmonic generation of the second order. This is due to the fact that dynamics of the oscillating electrons is altered due to the Lorentz force which, in turn, modifies the plasma wave and, hence, results in the efficient second-harmonic generation.

Research Article
Copyright © Cambridge University Press 2019

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