长交互气体管中受传播影响的高次谐波发生时谐波线的谱移和分裂

IF 1.7 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Atoms Pub Date : 2023-12-01 DOI:10.3390/atoms11120150
J. Seres, E. Seres, Carles Serrat, T. Dinh, Noboru Hasegawa, M. Ishino, M. Nishikino, S. Namba
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引用次数: 0

摘要

在氦气长介质中产生高次谐波时,在一定的激光强度和啁啾下,实验观察到谐波线的谱移和分裂,有时超过一个谐波阶。除了报告这些结果外,还进行了数值模拟来理解这一现象。在强场近似下求解三维传播模型。模拟结果表明,激光束在传输过程中的畸变和相应的相位匹配条件的变化是造成观测结果的主要原因。所观察到的现象可以作为一个很好的工具来产生覆盖13.5 nm左右宽范围的可调谐窄带谐波源,用于光谱学和播种x射线激光器,并了解种子波长的非期望失谐。
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Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube
While generating high harmonics in long media of helium gas, at certain laser intensities and chirp, the spectral shift and split of the harmonic lines were experimentally observed, sometimes exceeding one harmonic order. Beyond reporting these results, numerical simulations were performed to understand the phenomenon. A 3D propagation model was solved under the strong field approximation. According to the simulations, the distortion of the laser beam profile during propagation and the consequently accused change in the conditions of phase matching are responsible for the observations. The observed phenomena can be an excellent tool to produce tunable narrow band harmonic sources covering a broad range around 13.5 nm for spectroscopy and for seeding X-ray lasers, and to understand non-desired detuning of the seed wavelength.
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来源期刊
Atoms
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
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