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Light(Science & Applications) 2022年第8期11卷 1925-1932页

作者： Sheng Liu shuxia qi Yanke Li Bingyan Wei Peng Li Jianlin Zhao Key Laboratory of Light Field Manipulation and Information Acquisition Ministry of Industry and Information Technologyand Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an710129China

Pancharatnam–Berry (PB) phase has become an effective tool to realize the photonic spin Hall effect (PSHE) in recent years, due to its capacity of enhancing the spin-orbit interaction. Various forms of PSHEs have been proposed by tailoring the PB phase of light, however, the propagation trajectory control of the separated spin states has not been reported. In this paper, we realize the oscillated spin-dependent separation by using the well-designed PB phase optical elements based on the transverse-to-longitudinal mapping of Bessel beams. Two typical oscillated PSHEs, i.e., the spin states are circulated and reversed periodically, are experimentally demonstrated with two PB phase elements fabricated with liquid crystal. The displacements and periods of these oscillations can be controlled by changing the transverse vector of the input Bessel beam. The proposed method offers a new degree of freedom to manipulate the spin-dependent separation, and provides technical supports for the application in spin photonics.

关键词： interaction. Bessel Berry

Dynamically measuring the holo-information of light fields in three-dimensional space using a periodic polarization-structured light

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Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 58-65页

作者： shuxia qi Sheng Liu Lei Han BingYan Wei Peng Li JinZhan Zhong XuYue Guo JianLin Zhao Key Laboratory of Light-field Manipulation and Information Acquisition Ministry of Industry and Information Technologyand Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnic UniversityXi'an 710129China

Spatially structured light field has attracted great attention due to its novel properties and application potential in numerous *** them,the most striking one is the polarization-structured light,known as the vector ***,using a periodic polarization-structured light,we propose a method to dynamically measure the holo-information of light fields,including the amplitude,phase,and polarization distributions,in three-dimensional(3D)*** measurement system is composed of a Mach-Zender interferometer involving a liquid crystal polarized grating in the reference arm,which is simple,stable,and easy to *** the single-shot measurement,this method supports observing the dynamic variation of object light *** accuracy,3D polarimetry,and dynamic observation of this method are validated by measuring a calibrated quarter-wave plate,a vector vortex beam,a Poincarébeam,and a stressed polymethyl methacrylate sample.

关键词： polarization structured light measurement holography

Highly efficient generation of arbitrary vector beams with tunable polarization, phase, and amplitude

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Photonics Research 2018年第4期6卷 228-233页

作者： SHENG LIU shuxia qi YI ZHANG PENG LI DONGJING WU LEI RAN JIANLIN ZHAO MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology School of Science Northwestern Polytechnical University Xi'an 710129 China

We propose an efficient and robust method to generate tunable vector beams by employing a single phasetype spatial light modulator(SLM). With this method, a linearly polarized Gaussian beam can be converted into a vector beam with arbitrarily controllable polarization state, phase, and amplitude. The energy loss during the conversion is greatly reduced and depends mainly on the reflectivity of the SLM. We experimentally demonstrate that conversion efficiency of about 47% is achieved by using an SLM with reflectivity of 62%.Several typical vector beams, including cylindrical vector beams, vector beams on higher order Poincaré spheres,and arbitrary vector beams attached with phases and with tunable amplitude, are generated and verified experimentally. This method is also expected to create high-power vector beams and play important roles in optical fabrication and light trapping.

关键词：空间光调制器光束通讯技术发展现状

Polarization oscillating beams constructed by copropagating optical frozen waves

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Photonics Research 2018年第7期6卷 756-761页

作者： PENG LI DONGJING Wu YI ZHANG SHENG LIU Yu LI shuxia qi JIANLIN ZHAO MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information TechnologySchool of ScienceNorthwestern Polytechnical UniversityXi'an 710129China Department of Public Education Northwestern Polytechnical University Ming De CollegeXi'an 710124China

Polarization oscillating beams, namely, polarization standing waves, commonly formed by a pair of coherent counterpropagating light waves with orthogonal polarizations, oscillate their states of polarization periodically within a wavelength interval, offering conceptual and practical interests in light-matter interactions such as the nonreciprocal magnetoelectric effect, and impressive applications in optical imaging, sensing, and chirality detection. Here, we propose a new class of polarization oscillating beams that longitudinally vary states of polarization with spatial intervals within centimeters via the superposition of two copropagating optical frozen waves with preshaped longitudinal intensity profiles and transverse phase structures. The flexibility and manipulability are demonstrated by creating several polarization oscillating beams with different polarization structures. This work paves a new way to manipulate other waves and may be useful for applications of optical standing waves in optical manipulation, light guiding of atoms, polarization-sensitive sensing, etc.

关键词：偏振振荡光束光波通信技术理论分析

Visible frequency broadband dielectric metahologram by random Fourier phase-only encoding

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Science China(Physics,Mechanics & Astronomy) 2021年第1期64卷 64-71页

作者： XuYue Guo Peng Li BingJie Li Sheng Liu BingYan Wei Wei Zhu JinZhan Zhong shuxia qi JianLin Zhao MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an710129China

In recent years,metasurfaces that enable the flexible wavefront modulation at sub-wavelength scale have been widely used into holographic display,due to its prominent advantages in polarization degrees of freedom,viewing angle,and achromaticity in comparison with traditional holographic *** holography,the computational complexity of hologram,imaging sharpness,energy utilization,reproduction rate,and system indirection are all determined by the encoding ***,we propose a visible frequency broadband dielectric metahologram based on the random Fourier phase-only encoding *** this simple and convenient method,we design and fabricate a transmission-type geometric phase all-dielectric metahologram,which can realize holographic display with high quality in the visible frequency *** method encodes the amplitude information into the phase function only once,eliminating the cumbersome iterations,which greatly simplifies the calculation process,and may facilitate the preparation of large area nanoprint-holograms.

关键词： metahologram phase random encoding imaging

Modulation of orbital angular momentum on the propagation dynamics of light fields

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Frontiers of Optoelectronics 2019年第1期12卷 69-87页

作者： Peng LI Sheng LIU Yi ZHANG Lei HAN Dongjing WU Huachao CHENG shuxia qi Xuyue GUO Jianlin ZHAO MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information TechnologySchool of ScienceNorthwestern Polytechnical UniversityXi’an 710072China

Optical vortices carrying orbital angular momentum(OAM)have attracted extensive attention in recent decades because of their interesting applications in optical trapping,optical machining,optical communication,quantum information,and optical *** effects induced by OAMs,such as angular momentum conversion,spin Hall effect of light(SHEL),and spin– orbital interaction,have also gained increasing *** this article,we provide an overview of the modulations of OAMs on the propagation dynamics of scalar and vector fields in free ***,we introduce the evolution of canonical and noncanonical optical vortices and analyze the modulations by means of local spatial ***,we review the Pancharatnam–Berry(PB)phases arising from spin–orbital interaction and reveal the control of beam evolution referring to novel behavior such as spindependent splitting and polarization singularity ***,we discuss the propagation and focusing properties of azimuthally broken vector vortex beams.

关键词： orbital angular momentum polarization spin angular momentum Pancharatnam-Berry (PB) phase angular diffraction

Hybrid vector beams with non-uniform orbital angular momentum density induced by designed azimuthal polarization gradient

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Chinese Physics B 2020年第9期29卷 129-135页

作者：韩磊齐淑霞刘圣李鹏程华超赵建林 MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi'an 710129China

Based on angular amplitude modulation of orthogonal base vectors in common-path interference method, we propose an interesting type of hybrid vector beams with unprecedented azimuthal polarization gradient and demonstrate in experiment. Geometrically, the configured azimuthal polarization gradient is indicated by intriguing mapping tracks of angular polarization states on Poincaré sphere, more than just conventional circles for previously reported vector beams. Moreover, via tailoring relevant parameters, more special polarization mapping tracks can be handily achieved. More noteworthily, the designed azimuthal polarization gradients are found to be able to induce azimuthally non-uniform orbital angular momentum density, while generally uniform for circle-track cases, immersing in homogenous intensity background whatever base states are. These peculiar features may open alternative routes for new optical effects and applications.

关键词： hybrid vector beam polarization gradient polarization mapping track orbital angular momentum density

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我国大型质谱仪器发展现状与展望

实验技术与管理 2024年第7期41卷 1-8页

作者：杨丽岳琦类淑霞王晋北京市科学技术研究院创新发展战略研究所北京100089 国家科技基础条件平台中心北京100083 北京市科学技术研究院科技情报研究所北京100089

质谱仪器是基础研究领域不可或缺的分析工具,目前,我国科学研究持续高质量发展,但质谱仪器自主研发生产水平较低,这种供给现状形成的结构性矛盾日渐凸显。该文首先梳理了质谱仪器技术发展和我国质谱仪器产业格局;然后结合高校院所质谱... 详细信息

质谱仪器是基础研究领域不可或缺的分析工具,目前,我国科学研究持续高质量发展,但质谱仪器自主研发生产水平较低,这种供给现状形成的结构性矛盾日渐凸显。该文首先梳理了质谱仪器技术发展和我国质谱仪器产业格局;然后结合高校院所质谱仪器使用现状,分析了我国质谱技术与产业发展的困境;最后提出保持政策支持力度、加强示范应用顶层设计、推动良好产业生态的完善、促进科研端与产业端协同发力等对策建议,以期加速国产质谱技术的迭代升级,提高国产化替代水平和应用规模。

关键词：质谱仪器仪器分布国产仪器自主研发进口仪器

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基于形状上下文和粒子滤波的多目标跟踪

电子技术应用 2015年第1期41卷 156-160页

作者：祁淑霞山东政法学院信息学院山东济南250014

目标跟踪是计算机视觉领域里研究的热点和难点。提出一种基于形状上下文和粒子滤波的多目标跟踪算法,通过在跟踪过程中融入目标检测信息来处理目标进入与离开场景问题和目标重叠与分离问题。首先,采用自适应增强检测算法对视频区域中的... 详细信息

目标跟踪是计算机视觉领域里研究的热点和难点。提出一种基于形状上下文和粒子滤波的多目标跟踪算法,通过在跟踪过程中融入目标检测信息来处理目标进入与离开场景问题和目标重叠与分离问题。首先,采用自适应增强检测算法对视频区域中的目标进行检测;然后,利用形状上下文特征来建立被跟踪目标的外观模型;最后,利用粒子滤波方法进行粒子的选择和目标的跟踪。实验证明,提出的算法能够有效处理目标进入与离开场景的问题和目标重合与分离的问题,在单一背景和复杂背景下都能进行较为准确的跟踪,还能一定程度上处理部分遮挡问题。

关键词：多目标跟踪目标检测形状上下文特征粒子滤波

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光场偏振分布测量方法及其应用(特邀)

光子学报 2022年第8期51卷 35-54页

作者：齐淑霞刘圣李鹏魏冰妍张蒙蒙豆嘉真张继巍赵建林西北工业大学物理科学与技术学院陕西省光信息技术重点实验室西安710129

偏振是光的固有属性之一,用于描述电矢量的振动方向,也是光场的一个重要信息参量。光场的偏振测量,尤其是具有复杂空间结构光场的偏振分布测量,是研究光场偏振特性及其应用的重要课题。本文从偏振测量的相关原理出发,总结评述近年来有... 详细信息

偏振是光的固有属性之一,用于描述电矢量的振动方向,也是光场的一个重要信息参量。光场的偏振测量,尤其是具有复杂空间结构光场的偏振分布测量,是研究光场偏振特性及其应用的重要课题。本文从偏振测量的相关原理出发,总结评述近年来有关光场偏振分布测量和材料光学各向异性测量方法的发展动态,以及不同条件下光场的斯托克斯参量、光学各向异性材料的琼斯矩阵和双折射参数的测量方法及其应用。

关键词：偏振偏振测量双折射数字全息术超表面