Interference mechanism of plasma self-organization in transparent dielectrics under the intense femtosecond laser pulse exposure

IF 1.8 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
EPL Pub Date : 2024-08-20 DOI:10.1209/0295-5075/ad69bd
A. V. Bogatskaya, E. A. Volkova and A. M. Popov
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引用次数: 0

Abstract

A new mechanism of plasma self-organization in transparent dielectrics with wide bandgap exposed to the intense tightly focused laser radiation was revealed, which causes the generation of 3D periodic ring structures with subwavelength period both along the laser pulse propagation and in the radial direction. The mechanism involves formation of dense plasma burst in the pre-focal region that provides efficient scattering of the incident wave. The interference of a plane incident laser wave in the focal region and a divergent reflected one will form the standing wave pattern with local minima and maxima of laser field both in the direction of the incident wave propagation and perpendicular to it producing the ring patterns of effective ionization regions in the dielectric volume. Analytical and numerical simulations of the process of laser wave scattering on a near-spherical plasma object with dimensions both smaller and larger than the laser radiation wavelength are performed to verify the proposed model.
强飞秒激光脉冲照射下透明电介质中等离子体自组织的干涉机制
研究揭示了宽带隙透明电介质在强激光紧聚焦辐射下等离子体自组织的新机制,该机制导致沿激光脉冲传播方向和径向产生具有亚波长周期的三维周期性环状结构。其机理包括在预聚焦区域形成高密度等离子体爆发,从而有效地散射入射波。焦点区域的平面入射激光波和发散反射波的干涉将形成驻波模式,在入射波传播方向和垂直于入射波传播方向上都有激光场的局部最小值和最大值,从而在介质体积中产生有效电离区域的环形模式。为了验证所提出的模型,我们对激光波在尺寸小于和大于激光辐射波长的近球形等离子体上的散射过程进行了分析和数值模拟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
EPL
EPL 物理-物理:综合
CiteScore
3.30
自引率
5.60%
发文量
332
审稿时长
1.9 months
期刊介绍: General physics – physics of elementary particles and fields – nuclear physics – atomic, molecular and optical physics – classical areas of phenomenology – physics of gases, plasmas and electrical discharges – condensed matter – cross-disciplinary physics and related areas of science and technology. Letters submitted to EPL should contain new results, ideas, concepts, experimental methods, theoretical treatments, including those with application potential and be of broad interest and importance to one or several sections of the physics community. The presentation should satisfy the specialist, yet remain understandable to the researchers in other fields through a suitable, clearly written introduction and conclusion (if appropriate). EPL also publishes Comments on Letters previously published in the Journal.
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