Role of Gas Pressure in Quasi-Phase Matching in High Harmonics Driven by Two-Color Laser Field

IF 1.7 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

Atoms Pub Date : 2023-07-07 DOI:10.3390/atoms11070103

S. Stremoukhov

引用次数: 0

Abstract

The results of a study on the effect of pressure in a medium consisting of a set of gas jets separated by vacuum gaps, interacting with two-color laser fields formed by the fundamental and the second harmonics of a laser, are presented herein. It has been demonstrated that a decrease in pressure leads to a shift in the region of harmonics where quasi-phase matching (QPM) occurs towards shorter wavelength radiation, accompanied by an increase in the efficiency of amplification of these harmonics. A feature of this process is the identical power-law character of the shift in the region and the increase in the efficiency of harmonic QPM amplification. Additionally, the study presents the results of the effect of inaccurately setting the width of the gas jets on the shape of the spectrum of harmonic QPM amplification.

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气压在双色激光场驱动的高次谐波准相位匹配中的作用

本文研究了由真空间隙分隔的一组气体射流组成的介质中压力与由激光基次谐波和次谐波形成的双色激光场相互作用的结果。结果表明，压力的减小会导致准相位匹配(QPM)发生的谐波区域向短波辐射方向移动，同时这些谐波的放大效率也会增加。该过程的一个特点是区域内位移具有相同的幂律特性，谐波QPM放大效率提高。此外，本文还研究了射流宽度设置不准确对谐波QPM放大频谱形状的影响。

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

Atoms Physics and Astronomy-Nuclear and High Energy Physics

CiteScore

2.70

自引率

22.20%

发文量

128

审稿时长

8 weeks

期刊介绍： Atoms (ISSN 2218-2004) is an international and cross-disciplinary scholarly journal of scientific studies related to all aspects of the atom. It publishes reviews, regular research papers, and communications; there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles. There are, in addition, unique features of this journal: -manuscripts regarding research proposals and research ideas will be particularly welcomed. -computed data, program listings, and files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Scopes: -experimental and theoretical atomic, molecular, and nuclear physics, chemical physics -the study of atoms, molecules, nuclei and their interactions and constituents (protons, neutrons, and electrons) -quantum theory, applications and foundations -microparticles, clusters -exotic systems (muons, quarks, anti-matter) -atomic, molecular, and nuclear spectroscopy and collisions -nuclear energy (fusion and fission), radioactive decay -nuclear magnetic resonance (NMR) and electron spin resonance (ESR), hyperfine interactions -orbitals, valence and bonding behavior -atomic and molecular properties (energy levels, radiative properties, magnetic moments, collisional data) and photon interactions