Dominance of polarization modes and absorption on self-focusing of laser beams in collisionless magnetized plasma

IF 2.9 4区 物理与天体物理 Q2 OPTICS Journal of Nonlinear Optical Physics & Materials Pub Date : 2024-04-30 DOI:10.1142/s0218863524500085
B. D. Vhanmore, S. P. Rajmane, S. B. Sadale, S. D. Patil, H. M. Shinde, R. J. Kamble, M. V. Takale
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Abstract

This work investigates the polarization modes i.e., Extraordinary (E-mode) and Ordinary (O-mode) on self-focusing of higher-order mode of elegant Hermite-cosh-Gaussian (EHChG) laser beams within collisionless magnetized plasma medium. In this study, the authors have taken transverse electromagnetic (TEM) mode with mode indices (0, 4) and explored. The ponderomotive force is primarily responsible for the dielectric constant’s nonlinearity in this context. Also, WKB and paraxial approximations via the parabolic wave equation approach are used to establish the general form of differential equations for beam-width parameters in both transverse dimensions of the beam. In this paper, the authors have theoretically investigated the dominance of polarization modes and absorption coefficient on self-focusing. The final results show good enhancement of laser propagation through collisionless plasma medium.

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偏振模式和吸收对激光束在无碰撞磁化等离子体中自聚焦的影响
这项研究探讨了非凡(E-mode)和普通(O-mode)偏振模式对无碰撞磁化等离子体介质中优雅赫尔墨特-科什-高斯(EHChG)激光束高阶模式自聚焦的影响。在这项研究中,作者选取了模式指数为(0,4)的横向电磁(TEM)模式进行了探讨。在这种情况下,介电常数的非线性主要是由思索动力造成的。同时,通过抛物面波方程方法,使用 WKB 和准轴向近似,建立了波束两个横向维度的波束宽度参数微分方程的一般形式。在本文中,作者从理论上研究了偏振模式和吸收系数对自聚焦的主导作用。最终结果表明,激光在无碰撞等离子体介质中的传播得到了很好的增强。
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来源期刊
CiteScore
3.00
自引率
48.10%
发文量
53
审稿时长
3 months
期刊介绍: This journal is devoted to the rapidly advancing research and development in the field of nonlinear interactions of light with matter. Topics of interest include, but are not limited to, nonlinear optical materials, metamaterials and plasmonics, nano-photonic structures, stimulated scatterings, harmonic generations, wave mixing, real time holography, guided waves and solitons, bistabilities, instabilities and nonlinear dynamics, and their applications in laser and coherent lightwave amplification, guiding, switching, modulation, communication and information processing. Original papers, comprehensive reviews and rapid communications reporting original theories and observations are sought for in these and related areas. This journal will also publish proceedings of important international meetings and workshops. It is intended for graduate students, scientists and researchers in academic, industrial and government research institutions.
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