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Review on non-dipole effects in ionization and harmonic generation of atoms and molecules

Chinese physics B 2020年第1期29卷 9-23页

作者： Mu-Xue Wang Si-Ge Chen Hao Liang Liang-You Peng State Key Laboratory for Artificial Microstructure and Mesoscopic physics School of PhysicsPeking UniversityBeijing 100871China Nano-optoelectronics Frontier Center of the Ministry of Education and Collaborative Innovation Center of Quantum Matter Beijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Beijing Academy of Quantum Information Sciences Beijing 100193China

In this review,we will focus on recent progress on the investigations of nondipole effects in few-electron atoms and molecules interacting with light *** first briefly survey several popular theoretical methods and relevant concepts in strong field and attosecond physics beyond the dipole *** phenomena stemming from the breakdown of the dipole approximation are then discussed in various topics,including the radiation pressure and photon-momentum transfer,the atomic stabilization,the dynamic interference,and the high-order harmonic *** available,the corresponding experimental observations of these nondipole effects are also introduced respectively in each topics.

关键词： nondipole effects photon-momentum strong field approximation attosecond physics

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Time-energy analysis of the photoionization process in a double-XUV pulse combined with a few-cycle IR field

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Chinese Optics Letters 2021年第12期19卷 116-123页

作者： Yi Jia Li Guo Shilin Hu Xinyan Jia Daihe Fan Ronghua Lu Shensheng Han Jing Chen School of physics Southwest Jiaotong UniversityChengdu 610031China Department of physics Shanghai Normal UniversityShanghai 200234China Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of physics and Astronomy Sun Yat-sen University(Zhuhai Campus)Zhuhai 519082China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Institute of Applied physics and Computational Mathematics Beijing 100088China Center for Advanced Material Diagnostic Technology College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China

We calculate the time-energy distribution(TED)and ionization time distribution(ITD)of photoelectrons emitted by a doubleextreme-ultraviolet(XUV)pulse and a two-color XUV-IR pulse using the Wigner distribution-like function based on the strong field *** a double-XUV pulse,besides two identical broad distributions generated by two XUV pulses,many interference fringes resulting from the interference between electrons generated,respectively,by two pulses appear in the *** adding an IR field,the TED intuitively exhibits the effect of the IR field on the electron *** ITDs during two XUV pulses are no longer the same and show the different changes for the different two-color fields,the origin of which is attributed to the change of the electric field induced by the IR *** analysis shows that the emission time of electrons ionized during two XUV pulses mainly depends on the electric field of the combined XUV pulse and IR pulse.

关键词： Wigner distribution two-color field time-energy distribution attosecond physics strong field approximation

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