Symmetry in Strong-Field Physics II

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 1408

Special Issue Editors


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Guest Editor
Minhang Campus, East China Normal University, Shanghai, China
Interests: strong laser–matter interaction; squeezing of quantum light; multi-dimensional spectroscopy
Special Issues, Collections and Topics in MDPI journals
Zhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Taizhou 31800, China
Interests: high harmonic generation; attosecond physics; ultrafast spectroscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the interaction between a strong femtosecond laser and gaseous or solid targets, many ultrahigh-order nonlinear phenomena can occur, such as high harmonic generation, tunneling ionization, double ionization, laser-induced electron diffraction, laser-induced ultrafast current, etc. To model the experimentally detected signal, the most reliable method is solving a time-dependent Schrӧdinger equation (TDSE) or some other expanded dynamic equation. Many semi-analytic models were also developed to help people understand the physical process more clearly.  

Indeed, the output signal is largely governed by the symmetry property of the target. Thus, it is natural to analyze the data obtained experimentally or numerically from the viewpoint of symmetry. As people obtain more and more knowledge about the connection between the symmetry property of the target and the feature of an ultrafast signal, it becomes easier to predict the characteristics of the output signal. Additionally, the ultrafast output signal could be an effective tool to detect the symmetry property of an unknown target. In particular, to achieve the ultrafast time resolution of monitoring phase transitions with the symmetry property changed, it is critical to study the causal relationship between the symmetry property of the sample and the features of the output signal.   

Dr. Shicheng Jiang
Dr. Jigen Chen
Guest Editors

Manuscript Submission Information

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Keywords

  • space-time symmetry
  • strong-field physics
  • ultrafast spectroscopy
  • high harmonic generation
  • time-resolved detection

Published Papers (1 paper)

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Research

8 pages, 2456 KiB  
Article
Orientation-Dependent High-Order Harmonic Generation from Monolayer ZnO
by Zijian Hu, Xiance Xie, Zhihong Yang, Yunhui Wang and Shicheng Jiang
Symmetry 2023, 15(7), 1427; https://doi.org/10.3390/sym15071427 - 15 Jul 2023
Cited by 2 | Viewed by 1056
Abstract
Solid-state high-order harmonic generation (HHG) now is a strong tool for detecting target properties, like band structure, Berry curvature and transition dipole moments (TDMs). However, the physical mechanism of high-order harmonic generation (HHG) in solids has not been fully elucidated. According to previously [...] Read more.
Solid-state high-order harmonic generation (HHG) now is a strong tool for detecting target properties, like band structure, Berry curvature and transition dipole moments (TDMs). However, the physical mechanism of high-order harmonic generation (HHG) in solids has not been fully elucidated. According to previously published works, in addition to the inter-band polarization, intra-band currents, and anomalous currents due to Berry curvature, there is another term which will be called the mixture term (MT). Taking monolayer ZnO as a sample, it is found that the intensity of the mixture term, which has been ignored for a long time in previous works, actually is comparable with other terms. Additionally, we compare the orientation-dependent HHG spectra that originated from different mechanisms. It is found that the inter-band and mixture HHG show similar orientation features. Meanwhile, Berry curvature only produces perpendicularly polarized even harmonics, and intra-band perpendicularly polarized even harmonics show special orientation features which can be explained by the orientation-dependent group velocity. This work will help people understand the mechanisms of solid-HHG better. Full article
(This article belongs to the Special Issue Symmetry in Strong-Field Physics II)
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