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Effect of elliptical polarizations on nonsequential double ionization in two-color elliptically polarized laser fields

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Chinese Physics B 2018年第9期27卷 247-253页

作者： Tong-Tong Xu Jia-He Chen xue-fei pan Hong-Dan Zhang Shuai Ben and xue-Shen Liu t Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China

Using the classical ensemble model, we investigate the nonsequential double ionization（NSDI） of Ar and Mg in the two-color elliptically polarized laser pulse for different elliptical polarizations. Numerical results show that for Ar atoms the NSDI yield increases as the ellipticity increases, which is different from the case of Mg atoms. Moreover, the correlated behavior in the correlated electron momentum along the x direction and ion momentum distributions of Ar atoms are influenced by the ellipticity. By statistical analysis of different times, we can conclude that the ellipticity may be responsible for the NSDI processes. The correlated momenta distributions along the x direction at the recollision time are demonstrated and the results show that the travelling time and ellipticity can affect the emitted directions of both electrons.

关键词： nonsequential double ionization two-color elliptically polarized laser pulse ellipticity momentum distributions

Two-center interference in high-harmonic generation of H2%＋ in a combination of a mid-infrared laser field and a terahertz field

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Chinese Physics B 2017年第1期26卷 176-181页

作者： Jun Zhang xue-fei pan Tong-Tong Xu Hong-Dan Zhang Hui Du Jing Guo xue-Shen Liu Institute of Atomic and Molecular Physics Jilin University Changchun 130012 China

We theoretically investigate the two-center interference in high-order harmonics generated from the H2-＋ in a combination of a mid-infrared laser and a terahertz field by numerically solving the time-dependent Schr ¨odinger equation（TDSE）.The interference minima in high-order harmonic generation（HHG） are effectively suppressed when a THz field is *** contribution to HHG from the two separate nuclei is used to demonstrate the locating order of the harmonic ***, we also investigate the emission time of harmonics. The results show that the intensity of the short path around 60^th order after adding a THz field is stronger than that in the mid-infrared laser field, which further illustrates the suppression of the interference minima in HHG.

关键词： terahertz field high-order harmonic two-center interference

Spectral shift of solid high-order harmonics from different channels in a combined laser field

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Chinese Physics B 2023年第3期32卷 244-251页

作者：曹冬冬潘雪飞张军刘学深 Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China College of Science Northeast Forestry UniversityHarbin 150040China

We investigate theoretically the spectral shift of the high-order harmonic generation(HHG)in ZnO driven by a combined laser field by solving the two-band semiconductor Bloch equations(SBEs)in the velocity *** combined laser field is synthesized by a fundamental laser pulse and its seventh-frequency laser *** the seventh-frequency laser pulse is added to the rising or falling parts of the fundamental laser field,we find that the spectral blueshift or redshift appears,which is due to the unequal contribution of the rising and falling parts in the fundamental laser field to the *** analyzing the time-dependent conduction band population in k space,we found that,in addition to the tunneling ionization channel,there is also the resonant electron injection channels which is induced by the seventh-frequency laser *** harmonics generated by the different channels show the spectral redshift or the spectral blueshift,*** analyzing the k-integrated transient conduction band population of the electrons from different channels,we found that if there is a certain delay in the process of the electron excitation,it will lead to the delay in the harmonic emission,which results in the spectral redshift of the harmonics.

关键词： high-order harmonic generation ZnO crystal spectral shift of harmonics resonant electron injection channels

Spatial distribution on high-order-harmonic generation of an H2+ molecule in intense laser fields

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Spatial distribution on high-order-harmonic generation of an...

Co-production of hydrogen, oxygen, and electricity via an integrated solar-driven system with decoupled water electrolyzer and Na-Zn ion battery

第六届全国计算原子与分子物理学术会议

作者： Jun Zhang Hong-Dan Zhang xue-fei pan Tong-Tong Xu Jing Guo xue-Shen Liu Institute of Atomic and Molecular Physics Jilin University

＜正＞High-order-harmonic generation（HHG）via laser-matter interaction has been intensively studied in recent years because of its applications in generating isolated attosecond *** attosecond pulses are significant for probing,for example,nuclear dynamics and photoelectron wave *** the molecular structure is more complex and the degrees of freedom in molecules are more than that in atoms,the harmonic

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来源： cnki会议评论

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Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia pan Dengwei Jing Yubin Chen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关键词： Hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

High-resolution imaging through dynamic scattering media: Iterative optimization based on polarimetric characteristics

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Science China Technological Sciences 2025年第1期 82-84页

作者： Meng XIANG Kai DENG Tianyu WANG Jinpeng LIU xue DONG Teli XI fei LIU Xiaopeng SHAO School of Optoelectronic Engineering Xidian University Xi'an Key Laboratory of Computational Imaging National Key Laboratory of Infrared Detection Technologies

High-resolution imaging through randomly dynamic scattered fields and highly scattered walls is an extensively sought-after capability with potential applications in various fields such as underwater imaging, biomedical imaging, and seeing through fog. Numerous methods have been proposed to unscramble object information from degraded scattered images, resulting in considerable improvements in image contrast in degraded scenarios [1].

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Construction of 3D porous Cu_(1.81)S/nitrogen-doped carbon frameworks for ultrafast and long-cycle life sodium-ion storage

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 191-200页

作者： Chen Chen Hongyu xue Qilin Hu Mengfan Wang pan Shang Ziyan Liu Tao Peng Deyang Zhang Yongsong Luo Key Laboratory of Microelectronics and Energy of Henan Province Henan Joint International Research Laboratory of New Energy Storage TechnologyCollege of Physics and Electronic EngineeringXinyang Normal UniversityXinyang 464000China School of Physics and Electronic Engineering Nanyang Normal UniversityNanyang 473061China

Transition metal sulfides have great potential as anode mterials for sodium-ion batteries(SIBs)due to their high theoretical specific ***,the inferior intrinsic conductivity and large volume variation during sodiation-desodiation processes seriously affect its high-rate and long-cyde performance,unbeneficial for the application as fast-charging and long-cycling SIBs ***,the three-dimensional porous Cu_(1.81)S/nitrogen-doped carbon frameworks(Cu_(1.81)S/NC)are synthesized by the simple and facile sol-gel and annealing processes,which can accommodate the volumetric expansion of Cu_(1.81)S nanoparticles and accelerate the transmission of ions and electrons during Na^(+)insertion/extraction processes,exhibiting the excellent rate capability(250.6 mA·g^(-1)at 20.0 A·g^(-1))and outstanding cycling stability(70% capacity retention for 6000 cycles at 10.0 A·g^(-1))for ***,the Na-ion full cells coupled with Na_(3)V_(2)(PO_(4))_(3)/C cathode also demonstrate the satisfactory reversible specific capacity of 330.5 mAh·g^(-1)at 5.0 A·g^(-1)and long-cycle performance with the 86.9% capacity retention at 2.0 A·g^(-1)after 750 *** work proposes a promising way for the conversionbased metal sulfides for the applications as fast-charging sodium-ion battery anode.

关键词： copper sulfide nanoparticles porous carbon framework fast charging long-cycle performance sodium-ion full batteries

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开放式证券投资基金预留现金比例的确定

系统工程学报 2004年第1期19卷 20-24页

作者：汪温泉俞雪飞潘德惠东北大学工商管理学院辽宁沈阳110004

证券投资基金是一种利益共享、风险共担的集合证券投资方式.作为投资基金的最先进形式,开放式基金的设立将对我国证券市场的发展和完善有着极其重要的推动作用.文章针对开放式证券投资基金的申购、赎回机制,给出了一种确定基金预留现金... 详细信息

证券投资基金是一种利益共享、风险共担的集合证券投资方式.作为投资基金的最先进形式,开放式基金的设立将对我国证券市场的发展和完善有着极其重要的推动作用.文章针对开放式证券投资基金的申购、赎回机制,给出了一种确定基金预留现金比例系数的方法,为开放式基金公司的良性运作提供了一个参考.

关键词：开放式证券投资基金预留现金比例集合证券投资方式证券市场

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang xue Wenyao Zhang pan Xiong Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond