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Producing focused extreme ultraviolet vortex with Fermat-spiral photon sieves
《PhotoniX》2024年第1期476-483,共8页Junyong Zhang Huaiyu Cui Yuanyuan Liu Xiuping Zhang You Li Dongdi Zhao Yongpeng Zhao Qiwen Zhan 
supported by the National Natural Science Foundation of China(NSFC)(62175245,62005066,61875045,62105345,62305220 and 92050202);Shanghai Sailing Program(21YF1453700 and 23YF1429300);Strategic Priority Research Program of Chinese Academy of Sciences(XDA25020302 and XDA25020104).
Extreme ultraviolet(EUV)light is difficult to focus due to strong absorption of most materials.Photon sieves(PS),rather than Fresnel zone plates(FZP),can focus EUV to smaller spot and suppress the higher orders of sec...
关键词：Extreme ultraviolet focusing Orbital angular momentum Photon sieves Coherent diffraction imaing 
Properties of focused Laguerre–Gaussian beam propagating in anisotropic ocean turbulence被引量：1
《Chinese Physics B》2024年第2期386-393,共8页王新光 马洋斌 袁邱杰 陈伟 王乐 赵生妹 
This work was supported by the Science and Technology Innovation Training Program of Nanjing University of Posts and Telecommunications(Grant No.CXXZD2023080);the National Natural Science Foundation of China(Grant Nos.61871234 and 62001249);the Natural Science Foundation of Nanjing University of Posts and Telecommunications(Grant No.NY222133);the Open Research Fund of National Laboratory of Solid State Microstructures(Grant No.M36055).
We analyze the properties of a focused Laguerre–Gaussian(LG)beam propagating through anisotropic ocean turbulence based on the Huygens–Fresnel principle.Under the Rytov approximation theory,we derive the analytical ...
关键词：vortex beam orbital angular momentum focusing mirror anisotropic turbulence 
Constructing ultra-long focal fields via tightly focused Bessel beams
《Chinese Optics Letters》2023年第7期59-63,共5页郭兆金 黄铭帅 刘圣 李鹏 魏冰妍 赵建林 
supported by the National Key Research and Development Program of China(No.2022YFA1404800);National Natural Science Foundation of China(NSFC)(Nos.12074312,11634010,12074313,and 12174309);Fundamental Research Funds for the Central Universities(No.3102019JC008);Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(No.CX2021115)。
We numerically demonstrate that the tight focusing of Bessel beams can generate focal fields with an ultra-long depth of focus(DOF).The ultra-long focal field can be controlled by appropriately regulating the order of...
关键词：Bessel beam vector beam tight focusing depth of focus 
Electron Acceleration by Beating of Two Intense Cross-Focused Hollow Gaussian Laser Beams in Plasma
《Communications in Theoretical Physics》2018年第1期86-94,共9页Saleh T. Mahmoud Rakhi Gauniyal Nafis Ahmad Priyanka Rawat Gunjan Purohit 
Supported by United Arab Emirates University for Financial under Grant No.UPAR(2014)-31S164
This paper presents propagation of two cross-focused intense hollow Gaussian laser beams(HGBs) in collisionless plasma and its effect on the generation of electron plasma wave(EPW) and electron acceleration process,wh...
关键词：hollow Gaussian beams （HGBs） collisionless plasma cross-focusing electron plasma wave particle acceleration 
Application of gravity inversion focused in Changbai Mountain被引量：1
《Global Geology》2014年第1期62-66,共5页LI Qiuchen WU Yangang 
Focusing inversion is accomplished by the iterative of abnormal source to make the image gradually focused. It can better reflect the underground geological geometry and physical parameters. The model experiments in t...
关键词：focusing inversion gravity inversion Changbai Mountain 
Experimental verification on tightly focused radially polarized vortex beams被引量：2
《Chinese Physics B》2013年第6期356-359,共4页杜富荣 周哲海 谭峭峰 杨昌喜 张晓青 祝连庆 
supported by the National Natural Science Foundation of China (Grant Nos. 61108047 and 60908015);the Beijing Excellent Talent Training Project,China (Grant No. 2011D005007000008)
The theoretical and experimental results of tightly focused radially polarized vortex beams are demonstrated. An auto-focus technology is introduced into the measurement system in order to enhance the measurement prec...
关键词：vortex beams radial polarization tight focusing 
Experimental research on the longitudinal field generated by a tightly focused beam被引量：1
《Chinese Physics B》2013年第4期258-263,共6页张明倩 王佳 田芊 
Project supported by the National Natural Science Foundation of China (Grant Nos. 61177089 and 61227014);the National Basic Research Program of China (Grant No. 2007CB936801)
The longitudinal optical field is a peculiar physical phenomenon that is always involved with the domain of near-field optics. Due to its extraordinary properties, it has recently attracted increasing attention in res...
关键词：longitudinal optical field high numerical aperture focusing beam POLARIZATION 
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