Second Harmonic Generation of High-Power Elliptical Beam in Thermal Quantum Plasma
Abstract
The current study investigates second harmonic generation of elliptical beam in thermal quantum plasma (TQP) by taking relativistic-ponderomotive (RP) forces together. There is change in mass of electrons due to RP force thereby producing change in background density profile in a direction transverse to main beam. The main beam gets self-focused. The established density gradients excites electron plasma wave (EPW) at pump wave frequency. The excited EPW further interacts with pump wave to produce second harmonic generation (SHG). The widely accepted WKB and paraxial approximations are employed for deriving the 2nd order ODEs for semi major and semi-minor axes of elliptical beam with normalized propagation distance and efficiency of second harmonics. Furthermore, the influence of varying suitable laser-plasma parameters on beam waist dynamics and efficiency of 2nd harmonics are also explored.
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Copyright (c) 2025 Keshav Walia, Kulkaran Singh, Anuj Vijay, Deepak Tripathi
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