Harmonic generation in the interaction of laser with a magnetized overdense plasma

TL;DR

This study investigates harmonic generation in magnetized overdense plasmas using PIC simulations, revealing how laser intensity and magnetic field strength influence efficiency, with an optimal magnetic field maximizing harmonic output.

Contribution

The paper provides a detailed simulation-based analysis of harmonic generation mechanisms in magnetized plasmas, highlighting the dependence on magnetic field and laser intensity, and identifying optimal conditions.

Findings

Harmonic generation efficiency increases with laser intensity.

Efficiency depends on magnetic field strength, with an optimal value identified.

Harmonic generation enables laser energy propagation in overdense plasma.

Abstract

The mechanism of harmonic generation in both O and X-mode configurations for a magnetized plasma has been explored here in detail with the help of Particle-In-Cell (PIC) simulations. A detailed characterization of both the reflected and transmitted electromagnetic radiation propagating in the bulk of the plasma has been carried out for this purpose. The efficiency of harmonic generation is shown to increase with the incident laser intensity. Dependency of harmonic efficiency has also been found on magnetic field strength. This work demonstrates that there is an optimum value of the magnetic field at which the efficiency of harmonic generation maximizes. The observations are in agreement with theoretical analysis. For O-mode configuration, this is compelling as the harmonic generation provides for a mechanism by which laser energy can propagate inside an overdense plasma region.