Multiplexed Metasurfaces: Wavevector and Frequency Multiplexing Performed by a Spin‐Decoupled Multichannel Metasurface (Adv. Mater. Technol. 1/2020)
作者：
He-Xiu Xu;Guangwei Hu;Menghua Jiang;Shiwei Tang;Yanzhao Wang;...
期刊：
Advanced Materials Technologies ,2020年5(1):2070005- ISSN：2365-709X
作者机构：
[He-Xiu Xu; Yanzhao Wang; Chaohui Wang] Department of Electronic Science and Technology, Air force Engineering University, Xi'an, 710051 China;[Shiwei Tang] Department of Physics, Faculty of Science, Ningbo University, Ningbo, 315211 China;[Xiaohui Ling] College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang, 421002 China;[Jiafeng Zhou] Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, L69 3GJ UK;[Guangwei Hu; Menghua Jiang] Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583 Singapore
关键词：
dual mode;dynamic and geometric phase;multiplexed metasurfaces;spin decoupling;wavefront control
语种：
英文
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Spin-orbit interaction of a light beam under normal incidence at a sharp interface and its enhancement
作者：
Luo Hui-Ling;Ling Xiao-Hui* ;Zhou Xin-Xing* ;Luo Hai-Lu
期刊：
物理学报 ,2020年69(3):113-121 ISSN：1000-3290
通讯作者：
Ling Xiao-Hui;Zhou Xin-Xing
作者机构：
[Luo Hui-Ling; Ling Xiao-Hui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.;[Luo Hui-Ling; Ling Xiao-Hui; Zhou, XX; Zhou Xin-Xing] Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Peoples R China.;[Luo Hai-Lu] Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Ling Xiao-Hui; Ling, XH; Zhou, XX] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.;Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Peoples R China.
关键词：
光的自旋-轨道相互作用;涡旋相位;几何相位;角动量
摘要：
光束正入射至均匀突变界面时的自旋-轨道相互作用表现为拓扑荷数为±2的、自旋可控的涡旋相位.然而,该涡旋相位的物理来源以及界面的性质在自旋-轨道相互作用过程中起到何种作用,这些问题还有待解决.首先建立一个简洁的菲涅耳琼斯矩阵来描述这种自旋-轨道相互作用,并揭示其中的涡旋相位其实是一种贝里(Berry)几何相位,它来源于光束本身的拓扑结构,而界面的性质影响自旋-轨道相互作用的转换效率.一般情况下,转换效率极低,限制了其应用.因此,基于上述理论,提出采用光轴平行于界面法线方向的单轴薄层材料,来极大地增强这种自旋-轨道相互作用.
语种：
中文
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Ultrasensitive and real-time detection of chemical reaction rate based on the photonic spin Hall effect
作者：
Wang, Ruisi;Zhou, Junxiao;Zeng, Kuiming;Chen, Shizhen;Ling, Xiaohui;...
期刊：
APL Photonics ,2020年5(1):016105 ISSN：2378-0967
通讯作者：
Luo, Hailu
作者机构：
[Wang, Ruisi; Zhou, Junxiao; Luo, Hailu; Zeng, Kuiming; Chen, Shizhen] Hunan Univ, Sch Phys & Elect, Lab Spin Photon, Changsha 410082, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Shu, Weixing; Wen, Shuangchun] Hunan Univ, Sch Phys & Elect, Key Lab Micro Nanooptoelect Devices, Minist Educ, Changsha 410082, Peoples R China.
通讯机构：
[Luo, Hailu] H;Hunan Univ, Sch Phys & Elect, Lab Spin Photon, Changsha 410082, Peoples R China.
摘要：
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. However, the precise and real-time detection of the reaction rate remains challenging due to its fast and dynamical process. In this paper, the photonic spin Hall effect is proposed to realize the ultrasensitive and real-time detection of the reaction rate of sucrose hydrolysis. By incorporating with quantum weak measurement, the photonic spin-Hall shift acts as the measurement pointer, and the optical rotation in the process of sucrose hydrolysis acts as the postselection state. The high measurement resolution with 1.25 × 10-4 degree is achieved due to the weak-value amplification in quantum weak measurement which outperforms the standard polarimeter. In our scheme, the amplified measurement pointer is real-time monitoring the chemical reaction process. It does not involve any mechanical adjustment of optical elements once the experimental setup is established and thereby realizes a real-time detection of the dynamic chemical reaction. © 2020 Author(s).
语种：
英文
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Three-dimensional spin Hall effect of light in tight focusing
作者：
Shu, Weixing* ;Lin, Chuyang;Wu, Jun;Chen, Shizhen;Ling, Xiaohui;...
期刊：
PHYSICAL REVIEW A ,2020年101(2):023819 ISSN：2469-9926
通讯作者：
Shu, Weixing
作者机构：
[Wu, Jun; Shu, Weixing; Wen, Shuangchun; Luo, Hailu; Lin, Chuyang; Chen, Shizhen] Hunan Univ, Minist Educ, Key Lab Micro Nano Optoelect Devices, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.;[Wu, Jun; Shu, Weixing; Wen, Shuangchun; Luo, Hailu; Lin, Chuyang; Chen, Shizhen] Hunan Univ, Hunan Prov Key Lab Low Dimens Struct Phys & Devic, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.;[Wu, Jun; Lin, Chuyang] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China.;[Shu, Weixing; Zhou, Xinxing] Hunan Normal Univ, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
通讯机构：
[Shu, Weixing] H;Hunan Univ, Minist Educ, Key Lab Micro Nano Optoelect Devices, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.;Hunan Univ, Hunan Prov Key Lab Low Dimens Struct Phys & Devic, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.;Hunan Normal Univ, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
摘要：
We theoretically propose the realization of a three-dimensional (3D) spin Hall effect (SHE) of light by tightly focusing a linearly polarized light. Owing to the spin-orbital interaction in focusing, the left and right circularly polarized components of light are partly converted into each other, acquiring opposite vortex phases. As the superposition of the vortex and the initial vortex-free light, the two polarized components exhibit spiral intensity patterns which rotate oppositely around the propagation axis. Consequently, the two spin components are distributed alternatively in both the azimuthal and the longitudinal directions, leading to a 3D array of split spin components, and the transverse intensity is also spit asynchronously. Moreover, that array is rotatable by the incident polarization, and the longitudinal spacing in the array can be controlled by the numerical aperture of the lens. The 3D SHE of light finds an additional degree of freedom available to control the spin state of the photon, which may be valuable in optical manipulation and quantum information.
语种：
英文
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斯涅尔定律及其推广和应用
作者：
凌晓辉;王友文;戴志平
期刊：
物理通报 ,2020年(11):125-128 ISSN：0509-4038
作者机构：
衡阳师范学院物理与电子工程学院 湖南衡阳 421002;[戴志平; 王友文; 凌晓辉] 衡阳师范学院
关键词：
斯涅尔定律;超构材料;超构表面;光的自旋霍尔效应
摘要：
从光学和电磁学中经典的反射和折射定律(斯涅尔定律)出发,通过假设折射率为负、在界面人为地加横向相位梯度、非平面波(比如光束)入射等启发性提问,引入斯涅尔定律的几项重要拓展和推广,介绍斯涅尔定律在负折射效应、超构材料、超构表面及光的自旋霍尔效应等前沿领域的应用.
语种：
中文
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Wavevector and Frequency Multiplexing Performed by a Spin-Decoupled Multichannel Metasurface
作者：
Xu, He-Xiu* ;Hu, Guangwei;Jiang, Menghua;Tang, Shiwei;Wang, Yanzhao;...
期刊：
Advanced Materials Technologies ,2020年5(1):1900710- ISSN：2365-709X
通讯作者：
Xu, He-Xiu
作者机构：
[Wang, Yanzhao; Xu, He-Xiu; Wang, Chaohui] Air Force Engn Univ, Dept Elect Sci & Technol, Xian 710051, Shaanxi, Peoples R China.;[Hu, Guangwei; Jiang, Menghua] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore.;[Tang, Shiwei] Ningbo Univ, Dept Phys, Fac Sci, Ningbo 315211, Zhejiang, Peoples R China.;[Huang, Yongjun] Univ Elect Sci & Technol, Sch Informat & Commun Engn, Chengdu 611731, Sichuan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Xu, He-Xiu] A;Air Force Engn Univ, Dept Elect Sci & Technol, Xian 710051, Shaanxi, Peoples R China.
关键词：
dual mode;dynamic and geometric phase;multiplexed metasurfaces;spin decoupling;wavefront control
摘要：
Achieving kaleidoscopic wavefront controls with a thin flat plate is pivotal for increasing data capacity yet still challenging in integrated optics. An anisotropic metasurface provides an efficient recipe primarily for linear polarization, but is less efficient for multiple functionalities at arbitrary spin states. Here, a strategy of realizing a spin-decoupled high-capacity multifunctional metasurface by multiplexing the frequency and wavevector degree of freedom (DoF) is reported. By integrating both geometric and dynamic phases in split ring resonators and crossbars in a chessboard configuration, the inherent limitation of spin-flipped Pancharatnam–Berry phases can be completely decoupled between two spin states. Such released extraordinary DoF unprecedentedly increases the capability to yield kaleidoscopic wavefront control. To verify the significance, two proof-of-concept metadevices that are nearly impossible in conventional metasurfaces are experimentally demonstrated with four-port wavefront manipulations, exhibiting spin-, frequency-, and wavevector-dependent anomalous reflections, lensing, orbital angular momentum generation, and wavevector-multiplexed vortex scattering, along with two-dimensional holograms. Both numerical and experimental results illustrate quad-distinct functionalities with up to ten channel beams and ≈93% efficiency, because of the completely suppressed crosstalk among different operation modes, angular wavevectors, and spins. The finding in triple-DoF multiplexing is expected to generate great interest in electromagnetic integration with emerging DoFs. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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Vortex generation in the spin-orbit interaction of a light beam propagating inside a uniaxial medium: origin and efficiency
作者：
Ling, Xiaohui* ;Luo, Huiling;Guan, Fuxin;Zhou, Xinxing;Luo, Hailu;...
期刊：
Optics Express ,2020年28(19):27258-27267 ISSN：1094-4087
通讯作者：
Ling, Xiaohui;Zhou, Lei
作者机构：
[Ling, Xiaohui; Luo, Huiling] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Guan, Fuxin; Zhou, Lei; Ling, Xiaohui; Zhou, L] Fudan Univ, State Key Lab Surface Phys, Key Lab Micro & Nano Photon Struct, Minist Educ, Shanghai 200433, Peoples R China.;[Guan, Fuxin; Zhou, Lei; Ling, Xiaohui; Zhou, L] Fudan Univ, Phys Dept, Shanghai 200433, Peoples R China.;[Zhou, Xinxing; Luo, Huiling] Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Peoples R China.;[Luo, Hailu] Hunan Univ, Sch Phys & Elect, Lab Spin Photon, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Ling, Xiaohui] H;[Ling, XH; Zhou, L] F;Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;Fudan Univ, State Key Lab Surface Phys, Key Lab Micro & Nano Photon Struct, Minist Educ, Shanghai 200433, Peoples R China.;Fudan Univ, Phys Dept, Shanghai 200433, Peoples R China.
关键词：
Crystals;Efficiency;Spin orbit coupling;Topology;Vortex flow;Anisotropic medium;Circularly polarized;Full wave analysis;Light-matter interactions;Spin orbit interactions;Topological charges;Topological structure;Vortex generation;Light propagation;article;berry;controlled study;crystal;handedness;light
摘要：
It has been known that an optical vortex with a topological charge +/- 2 can be generated as a circularly polarized (CP) light beam propagates in a bulk uniaxial crystal, but its physical origin remains obscure which also hinders its practical applications. Here, through a rigorous full-wave analyses on the problem, we show that, as a CP beam possessing a particular spin (handedness) propagates inside a uniaxial crystal, two beams with opposite spins can be generated caused by the unique spin-sensitive light-matter interactions in the anisotropic medium. Flipping the spin can offer the light beam an vortex phase with a topological charge of +/- 2 owing to the Pancharatnam-Berry mechanism, with efficiency dictated by the material properties of the uniaxial medium and the topological structure of the beam itself. With its physical origin fully uncovered, we finally discuss how to improve the efficiency of such effect, and compare the mechanisms of vortex generations in different systems. Our findings not only provide deeper understandings on such an intriguing effect, but also shed light on other spin-orbit-interaction-induced effects. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
语种：
英文
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Actively manipulating asymmetric photonic spin Hall effect with graphene
作者：
Wu, Yaodong;Sheng, Lijuan;Xie, Linguo;Li, Sixian;Nie, Ping;...
期刊：
Carbon ,2020年166:396-404 ISSN：0008-6223
通讯作者：
Zhou, Xinxing;Ling, Xiaohui
作者机构：
[Wu, Yaodong; Nie, Ping; Li, Sixian; Zhou, Xinxing; Sheng, Lijuan] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Sch Phys & Elect, Changsha 410081, Peoples R China.;[Xie, Linguo] Civil Aviat Flight Univ China, Key Lab Photon & Opt Detect Civil Aviat, Guanghan 618300, Peoples R China.;[Xie, Linguo] Civil Aviat Flight Univ China, Atmospher Lidar Inst, Guanghan 618300, Peoples R China.;[Chen, Yu] Shenzhen Univ, Coll Optoelect Engn, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Zhou, Xinxing; Ling, Xiaohui] H;Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Sch Phys & Elect, Changsha 410081, Peoples R China.;Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
摘要：
The photonic spin Hall effect (SHE), manifesting itself as spin-dependent splitting of light, holds potential applications in precise metrology and spin-based nanophotonic devices. Thus, it's highly desirable to control this effect at will. However, there lacks an active way for manipulating asymmetric spin splitting, i.e., the asymmetric splitting properties are fixed and cannot be dynamically modulated when the material is fabricated. In this work, we propose a simple and active method for manipulating the asymmetric in-plane spatial and angular shifts by considering a light beam reflected at the glass-air interface embedding with monolayer graphene. We theoretically establish the relationship between the in-plane spin shifts and the conductivity of graphene. We reveal that the in-plane spatial and angular shifts can be significantly adjusted and show obvious asymmetric features by changing the Fermi energy in graphene when the light beam is reflected near the Brewster and critical angles. Interesting, when the incident light is horizontally polarized, the optical shifts are more sensitive to the changes of Fermi energy near the Brewster angle than that near the critical angle. Finally, we propose a potential method that using spin angular shifts to directly detect the tiny variation of Fermi energy. © 2020 Elsevier Ltd
语种：
英文
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A comparative study of the spin-orbit interactions in Pancharatnam-Berry phase elements and in normal incidence of a light beam at a sharp interface
作者：
Luo, Huiling;Ling, Xiaohui* ;Zhou, Xinxing
作者机构：
[Ling, Xiaohui; Luo, Huiling] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.;[Zhou, Xinxing; Ling, Xiaohui; Luo, Huiling] Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Peoples R China.
会议名称：
SPIE Conference on Nanophotonics and Micro/Nano Optics V
会议时间：
OCT 21-26, 2019
会议地点：
Hangzhou, PEOPLES R CHINA
会议主办单位：
[Luo, Huiling;Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.^[Luo, Huiling;Ling, Xiaohui;Zhou, Xinxing] Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Peoples R China.
会议论文集名称：
Proceedings of SPIE
关键词：
Spin-orbit interaction;Vortex phase;Geometric phase
摘要：
Spin-controlled vortex generation is a manifestation of the spin-orbit interaction (SOI) of light, which has been extensively studied in Pancharatnam-Berry geometric phase elements in recent years. The SOI under the normal incidence of a light beam at a sharp interface, also shown by a spin-dependent vortex, has attracted little attention, except for a few exceptions. Here, we establish a Fresnel Jones matrix to fully describe the dynamics of beam reflection and refraction at sharp interfaces under normal incidence. It is pointed out that the vortex phase originates from the topological structure of the beam itself and is essentially a spin-redirection Berry phase. Although the geometric phase in Pancharatnam-Berry elements comes from the anisotropy of the external material, which shows a fundamental difference, they are the same in form. We then give a comparative study of the two kinds of SOI, and reveal the intrinsic connection and difference between them. Our research not only establishes a unified framework to describe the two SOIs, but also offers a new perspective for studying the SOIs in other physics.
语种：
英文
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基于超表面调控光的自旋-轨道相互作用研究
项目作者：
凌晓辉
项目作者单位：
衡阳师范学院
项目批准号：
11604087
资助经费：
0.0021万
立项时间：
2017-01-01到2019-12-31
项目类别：
青年科学基金项目
项目来源：
国家自科基金项目
项目关键词：
光的自旋-轨道相互作用;电磁超表面;光子角动量
项目摘要：
光子自旋-轨道相互作用是指光子的自旋角动量与轨道角动量之间的相互耦合或转换。以自旋-轨道相互作用为基础的光子学在信息存储与处理、微粒探测与操纵、各种功能光子器件设计等方面具有巨大潜力。然而，光子自旋-轨道相互作用非常弱，一般发生在波长尺度。如何有效地增强它并发展相应的调控方法是自旋-轨道光子学面临的重要课题。 .本项目将在建立电磁超表面的结构参数与光子自旋-轨道相互作用之间的定量变换关系的基础上，设计合适的超表面来操控光子自旋-轨道相互作用。与电子的自旋-轨道相互作用能在固态晶体中被增强一样，光子的自旋-轨道相互作用能被材料的各向异性显著增强，因此可通过合适地设计超表面进行调控。进一步设想引入石墨烯来构造光学性质可由外加电场控制的石墨烯超表面，从而主动地调控光子自旋-轨道相互作用。研究结果将形成主动操控光子自旋-轨道相互作用的方法，为下一步发展以自旋-轨道光子学为基础的应用方向打下坚实基础。
结题摘要：
光既可以具有自旋角动量，又可携带轨道角动量。自旋角动量与光的偏振有关，如左、右旋圆偏振光子分别携带 的自旋角动量。轨道角动量有两类，一类为内禀轨道角动量，与涡旋光场有关；另一类为外禀轨道角动量，和光束传播的轨迹有关，类似于经典粒子的机械角动量。光的自旋角动量和轨道角动量之间的相互转换和耦合被称为自旋–轨道相互作用或耦合。它是光学中的一种基本效应，广泛存在于界面的反射和折射、非均匀各向异性介质、强聚焦、粒子散射、表面波和消逝波等体系中，在光学、纳米光子学和等离子光学等领域扮演越来越重要的角色。光的自旋–轨道相互作用主要会导致为两种现象，一种为自旋可控的涡旋光场的产生，表现为内禀轨道角动量；另一种为光的自旋霍尔效应，表现为外禀轨道角动量。在同一系统中，不同条件下，这两种现象都可能出现。例如，当光束正入射至一个突变界面时可产生自旋相关的涡旋相位，斜入射时会发生自旋霍尔位移。这两种明显不同的自旋-轨道相互作用之间究竟有何内在联系？它们的内在物理机制到底是什么？首先我们建立了一般化的全波理论，来完全描述光束在界面反射和折射时的自旋-轨道相互作用，发现这两种自旋-轨道相互作用之间存在有趣的拓扑相变现象。这一理论不引入任何近似，不但可以回到已有的理论，还能描述之前的理论所不能描述的情形。其物理机制是由于其内在的Berry相位可以近似地看成是由方位相位和一维梯度相位的竞争和叠加而成，两类相位分别贡献于不同的自旋-轨道现象。进一步，我们提出设计合适的超构表面来调控这种自旋-轨道相互作用。我们的思想还可以推广至光学中的其它系统中的自旋-轨道相互作用。我们的研究不但解决了自旋光子学领域一些悬而未决和似是而非的问题，并且揭示了新的现象及其所暗含的物理机制，为自旋-轨道光子学的应用开辟了道路。
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Transformation of photonic spin Hall effect from momentum space to position space
作者：
Yi, Xunong* ;Ling, Xiaohui;Zhao, Mengting;Cai, Yuxin;Chen, Huan;...
期刊：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS ,2019年36(6):1397-1401 ISSN：0740-3224
通讯作者：
Yi, Xunong
作者机构：
[Li, Qianguang; Yi, Xunong; Chen, Huan; Cai, Yuxin; Zhao, Jiacheng; Zhao, Mengting] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
通讯机构：
[Yi, Xunong] H;Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
关键词：
Crystal symmetry;Momentum;ITS applications;Momentum spaces;Pancharatnam-Berry phase;Photonics devices;Propagation distances;Rational design;SIMPLE method;Theoretical calculations;Spin Hall effect
摘要：
Photonic spin Hall effect (PSHE) in momentum space can lead to a giant spin-dependent splitting (SDS). However, the SDS in momentum space increases linearly with beam propagation distance, which limits its applications. In this work, a simple method is proposed to transform the PSHE from momentum space to position space. We first theoretically analyze the feasibility of the transformation. The results show that the transformation can be realized when a light wave passes through two identical Pancharatnam Berry phase metasurfaces. Then an experimental setup is established to verify the theoretical results. Through rational design of the optical path, only one metasurface is needed to complete the transformation of PSHE from momentum space to position space. The experimental results agree well with theoretical calculations. We believe that these results are helpful for the design of photonics devices based on PSHE. © 2019 OSA - The Optical Society. All rights reserved.
语种：
英文
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Suppression effect of the spectral dispersion of sinusoidal phase modulated light on formation of hot images
作者：
Wang, Youwen* ;Ling, Xiaohui;Zhong, Yiqing;Dai, Zhiping;Chen, Liezun;...
作者机构：
[Wang, Youwen; Lu, Shizhuan; Chen, Liezun; Dai, Zhiping; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Zhong, Yiqing] Hunan Univ Environm & Biol, Dept Basic Courses, Hengyang 421005, Peoples R China.
会议名称：
Conference on High-Power Lasers and Applications X
会议时间：
OCT 22-23, 2019
会议地点：
Hangzhou, PEOPLES R CHINA
会议主办单位：
[Wang, Youwen;Ling, Xiaohui;Dai, Zhiping;Chen, Liezun;Lu, Shizhuan] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.^[Zhong, Yiqing] Hunan Univ Environm & Biol, Dept Basic Courses, Hengyang 421005, Peoples R China.
会议论文集名称：
Proceedings of SPIE
关键词：
Inertial confinement fusion (ICF);high-power laser system;hot image;small-scale self-focusing;smoothing by spectral dispersion (SSD);sinusoidal phase modulated laser beam
摘要：
In high-power laser systems for inertial confinement fusion, hot images may be intense enough to damage expensive optical components. Basing on split-step fast-Fourier-transform algorithm, the intensity and location of hot images of a spectrally dispersed sinusoidal phase modulated laser beam is numerically investigated. It is found that, the time-average intensity of hot image firstly decreases monotonically with the modulation depth and eventually reaches a certain minimum, then increases slowly and reaches a saturated value; in addition, with the modulation frequency and the grating dispersion coefficient increasing, the time-average intensity of hot image decreases generally; while the location of hot image always does not change. Finally, the influence of the distance from the obscuration to the nonlinear optical element on the suppression effect of spectral dispersion of sinusoidal phase modulated light on formation of hot images is discussed. The result is helpful to appropriately choose parameters of the spectrally dispersed sinusoidal phase modulated light to minimize the threat of optical damage of hot image and improve the performance of high- power laser system.
语种：
英文
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Interference-assisted kaleidoscopic meta-plexer for arbitrary spin-wavefront manipulation
作者：
Xu, He-Xiu* ;Hu, Guangwei;Li, Ying;Han, Lei;Zhao, Jianlin;...
期刊：
光：科学与应用 ,2019年8(1):3 ISSN：2095-5545
通讯作者：
Xu, He-Xiu;Qiu, Cheng-Wei;Cui, Tie Jun
作者机构：
[Han, Lei; Xu, He-Xiu; Hu, Guangwei; Qiu, Cheng-Wei; Li, Ying; Xu, HX] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore.;[Xu, He-Xiu; Wang, Guang-Ming; Yuan, Fang] Air Force Engn Univ, Air & Missile Def Coll, Xian 710051, Shaanxi, Peoples R China.;[Xu, He-Xiu; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421008, Peoples R China.;[Han, Lei; Zhao, Jianlin] Northwestern Polytech Univ, Sch Nat & Appl Sci, Xian 710072, Shaanxi, Peoples R China.;[Sun, Yunming] Adv Tech Dept, Key Lab Aeronaut Comp Tech, Xian 710075, Shaanxi, Peoples R China.
通讯机构：
[Xu, HX; Qiu, CW] N;[Xu, He-Xiu] A;[Xu, He-Xiu] H;[Cui, Tie Jun] S;Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore.
摘要：
Achieving simultaneous polarization and wavefront control, especially circular polarization with the auxiliary degree of freedom of light and spin angular momentum, is of fundamental importance in many optical applications. Interferences are typically undesirable in highly integrated photonic circuits and metasurfaces. Here, we propose an interference-assisted metasurface-multiplexer (meta-plexer) that counterintuitively exploits constructive and destructive interferences between hybrid meta-atoms and realizes independent spin-selective wavefront manipulation. Such kaleidoscopic meta-plexers are experimentally demonstrated via two types of single-layer spin-wavefront multiplexers that are composed of spatially rotated anisotropic meta-atoms. One type generates a spin-selective Bessel-beam wavefront for spin-down light and a low scattering cross-section for stealth for spin-up light. The other type demonstrates versatile control of the vortex wavefront, which is also characterized by the orbital angular momentum of light, with frequency-switchable numbers of beams under linearly polarized wave excitation. Our findings offer a distinct interference-assisted concept for realizing advanced multifunctional photonics with arbitrary and independent spin-wavefront features. A variety of applications can be readily anticipated in optical diodes, isolators, and spin-Hall meta-devices without cascading bulky optical elements. © 2019, The Author(s).
语种：
英文
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Chirality-Assisted High-Efficiency Metasurfaces with Independent Control of Phase, Amplitude, and Polarization
作者：
Xu, He-Xiu* ;Hu, Guangwei;Han, Lei;Jiang, Menghua;Huang, Yongjun;...
期刊：
Advanced Optical Materials ,2019年7(4):1801479- ISSN：2195-1071
通讯作者：
Xu, He-Xiu;Qiu, Cheng-Wei
作者机构：
[Xu, He-Xiu] Air Force Engn Univ, Air & Missile Def Coll, Xian 710051, Shaanxi, Peoples R China.;[Qiu, Cheng-Wei; Li, Ying; Han, Lei; Xu, He-Xiu; Xu, HX; Hu, Guangwei; Jiang, Menghua] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore.;[Chen, Liezun; Xu, He-Xiu; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.;[Han, Lei; Zhao, Jianlin] Northwestern Polytech Univ, Sch Nat & Appl Sci, Xian 710072, Shaanxi, Peoples R China.;[Huang, Yongjun] Univ Elect Sci & Technol China, Sch Informat & Commun Engn, Chengdu 611731, Sichuan, Peoples R China.
通讯机构：
[Xu, He-Xiu] A;[Xu, HX; Qiu, CW] N;[Xu, He-Xiu] H;Air Force Engn Univ, Air & Missile Def Coll, Xian 710051, Shaanxi, Peoples R China.;Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore.
关键词：
chirality-assisted metasurface;decoupling;self-accelerating beams;wavefront control
摘要：
<jats:title>Abstract</jats:title><jats:p>Simultaneously independent control of phase, amplitude, and polarization is pivotal yet challenging for manipulating electromagnetic waves by transmissive metasurfaces. Huygens' metasurface affords a high‐efficiency recipe primarily by engineering phase‐only meta‐atoms, restricting itself from realizing unprecedentedly complex functions of the transmission beam. Here, a 3D chirality‐assisted metasurface concept relying on integrated magnetoelectric meta‐atoms is proposed. It empowers the completely decoupled and arbitrary control of phase and amplitude at large incident angles and arbitrary polarizations. This strategy thus facilitates very sophisticated beam manipulations at close‐to‐unity cross‐polarized efficiency via trilayer integrated resonators with mutual twist. The prescribed phase coverage can be determined by geometrical footprints of the unit cell, while the global azimuthal twist unlocks the capability of tuning amplitudes without affecting the phase. The concept and significance of it are validated to implement several proof‐of‐prototype demanding functionalities by thin metasurfaces of λ<jats:sub>o</jats:sub>/12, which generate self‐accelerating diffraction‐free Airy beams, lateral and axial dual focusing, and even specific multiplexed beam shaping, respectively. This finding opens up an alternative way in very fine control of light with minimalist complexity and advanced performance. It can stimulate novel and high‐performance versatile photonic metadevices, thanks to the fully independent control of phase, amplitude, and polarization.</jats:p>
语种：
英文
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Realization of photonic spin Hall effect by breaking the rotation symmetry of optical field in light–matter interaction
作者：
Liu, Yuanyuan;Ling, Xiaohui* ;Zhang, Jin;Ke, Yougang;Shu, Weixing;...
期刊：
Optics Communications ,2018年427:238-243 ISSN：0030-4018
通讯作者：
Ling, Xiaohui
作者机构：
[Zhang, Jin; Luo, Hailu; Liu, Yuanyuan; Ke, Yougang] Hunan Univ, Sch Phys & Elect, Lab Spin Photon, Changsha 410082, Hunan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Shu, Weixing; Wen, Shuangchun] Hunan Univ, Sch Phys & Elect, Key Lab Micro Nano Optoelect Devices, Minist Educ, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Ling, Xiaohui] H;Hengyang Normal Univ, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
关键词：
Crystal symmetry;Fruits;Nanostructures;Optical beam splitters;Rotation;Azimuthal direction;Azimuthal rotation;Berry phase;Interaction systems;Right-circular polarizations;Rotation symmetry;Spin-dependent shift;Topological order;Spin Hall effect
摘要：
Photonic spin Hall effect (SHE) manifests itself as spin-dependent shift or splitting of a light beam, which is derived from spin–orbit interactions, and can be realized by breaking the rotation symmetry of light–matter interaction systems. Here, we demonstrate the observation of a photonic SHE by breaking the rotation symmetry of the optical field, while keeping the rotation symmetry of the inhomogeneous waveplate. The inhomogeneous waveplate constructed by dielectric nanostructures, introduces a spin-dependent Pancharatnam–Berry phase to the two spin components of the input beam, i.e., the left- and right-circular polarization components acquire exactly opposite vortex phases. During beam propagation, they experience opposite azimuthal rotations, and induce a four-lobe spin-dependent splitting in the azimuthal direction. In addition, the spin-dependent splitting becomes more evident upon beam propagation, and can be enhanced by increasing the topological orders of the nanostructures. For comparison, we also examine that no spin-dependent splitting can be observed when keeping the rotation symmetry of the incident optical field. © 2018 Elsevier B.V.
语种：
英文
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Wavenumber-Splitting Metasurfaces for Multi-Channel Diffusive Invisibility
作者：
Xu, He-Xiu* ;Wang, Guang-Ming;Zhang, Xiao-Kuan;Yuan, Fang;Ling, Xiaohui
作者机构：
[Wang, Guang-Ming; Yuan, Fang; Xu, He-Xiu; Zhang, Xiao-Kuan] Air Force Engn Univ AFEU, Air & Missile Def Coll, Xian, Shaanxi, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang, Peoples R China.
会议名称：
2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC)
会议时间：
21-24 July 2018
会议地点：
Xuzhou, China
会议主办单位：
[Xu, He-Xiu;Wang, Guang-Ming;Zhang, Xiao-Kuan;Yuan, Fang] Air Force Engn Univ AFEU, Air & Missile Def Coll, Xian, Shaanxi, Peoples R China.^[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang, Peoples R China.
会议论文集名称：
2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC)
关键词：
bifunctional;dual-polarized;nutitiband radar cross section (RCS) reduction;metasurface;parabolic phase
摘要：
Parabolic phase is commonly utilized for concave or convex metalens. Here, we report for the first time using such approach for determinant diffusion of scattering waves in wide incident angles by arranging parabolic-phased subarrays in arbitrary coding sequences. To engineer multi-spectrum polarization-dependent bifunctional scatterings, multi-mode anisotropic meta-atoms are utilized without polarization cross-talking. For verification, two proof-to-concept coding metasurfaces are designed, fabricated and measured at microwave regime. Numerical and experimental results show that the -10 dB backscatter radar cross-section (RCS) reduction is clearly observed in C, X and Ku band. Moreover, the diffusion behavior can be engineered dual-polarized and even bifunctional by integrating vortex scattering. Our findings, free of time-consuming optimizations, opened a rapid, easy but very efficient way for stealth applications under bistatic detection.
语种：
英文
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Deterministic Approach to Achieve Broadband Polarization-Independent Diffusive Scatterings Based on Metasurfaces
作者：
Xu, He-Xiu* ;Ma, Shaojie;Ling, Xiaohui;Zhang, Xiao-Kuan;Tang, Shiwei;...
期刊：
ACS Photonics ,2018年5(5):1691-1702 ISSN：2330-4022
通讯作者：
Xu, He-Xiu;Zhou, Lei
作者机构：
[Ma, Shaojie; He, Qiong; Xu, HX; Zhou, L; Xu, He-Xiu; Zhou, Lei; Cai, Tong; Ling, Xiaohui] Fudan Univ, State Key Lab Surface Phys, Key Lab Micro & Nano Photon Struct, Minist Educ, Shanghai 200433, Peoples R China.;[Ma, Shaojie; He, Qiong; Xu, HX; Zhou, L; Xu, He-Xiu; Zhou, Lei; Cai, Tong; Ling, Xiaohui] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China.;[Xu, He-Xiu; Zhang, Xiao-Kuan; Cai, Tong] Air Force Engn Univ, Air & Missile Def Coll, Xian 710051, Shaanxi, Peoples R China.;[Sun, Shulin] Fudan Univ, Shanghai Engn Res Ctr Ultraprecis Opt Mfg, Green Photon, Shanghai 200433, Peoples R China.;[Sun, Shulin] Fudan Univ, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China.
通讯机构：
[Xu, HX; Zhou, L; Zhou, Lei] F;[Xu, He-Xiu] A;[Xu, He-Xiu] H;Fudan Univ, State Key Lab Surface Phys, Key Lab Micro & Nano Photon Struct, Minist Educ, Shanghai 200433, Peoples R China.;Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China.
关键词：
broadband;diffusive scattering;focusing-phase;metasurface;Pancharatnam-Berry phase
摘要：
Diffusive scatterings of electromagnetic (EM) waves by a thin screen are important in many applications, but available approaches cannot ensure uniform angular distributions of low-intensity scatterings without time-consuming optimizations. Here, we propose a robust and deterministic approach to design metasurfaces to achieve polarization-independent diffusive scatterings of EM waves within an ultrabroad frequency band and for wide-range of incident angles. Our key idea is to use high-efficiency Pancharatnam-Berry meta-atoms to form subarrays exhibiting focusing reflection-phase profiles, that can guarantee nearly uniform diffusive scatterings for arbitrarily polarized EM waves. As an illustration, we design and fabricate two metasurfaces and experimentally characterize their wave-diffusion properties in C, X, and Ku bands. Theoretical, numerical and experimental results demonstrate that our approach can diffuse the incident energy much more uniformly than available approaches based on the uniform-phase subarrays, thanks to the intrinsic wave-diffusion capabilities of the focusing-phase subarrays. The -7 dB fractional bandwidth is measured as 88.3% and the diffusive scattering behavior can be preserved up to 60° off-normal incidence irrespective of incident polarizations. Our approach, simple and robust, can help realize stealth applications under bistatic detections. © 2017 American Chemical Society.
语种：
英文
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Sensitivity Enhanced Refractive Index Sensor by Reducing the Influence of In-Plane Wavevector in Photonic Spin Hall Effect
作者：
Sheng, Lijuan;Xie, Linguo;Luo, Huiling;Zhou, Xinxing* ;Ling, Xiaohui* ;...
期刊：
IEEE PHOTONICS JOURNAL ,2018年10(5):1-9 ISSN：1943-0655
通讯作者：
Zhou, Xinxing;Zhang, Zhiyou;Ling, Xiaohui
作者机构：
[Zhou, Xinxing; Luo, Huiling; Sheng, Lijuan] Hunan Normal Univ, Sch Phys & Elect, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China.;[Zhang, Zhiyou; Xie, Linguo] Sichuan Univ, Minist Educ, Key Lab High Energy Dens Phys & Technol, Chengdu 610064, Sichuan, Peoples R China.;[Zhou, Xinxing] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
通讯机构：
[Zhou, Xinxing; Ling, Xiaohui] H;[Zhang, Zhiyou] S;[Zhou, Xinxing] N;Hunan Normal Univ, Sch Phys & Elect, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China.;Sichuan Univ, Minist Educ, Key Lab High Energy Dens Phys & Technol, Chengdu 610064, Sichuan, Peoples R China.
关键词：
Photonic spin Hall effect;refractive index sensor;weak measurements
摘要：
Photonic spin Hall effect (SHE) can be an effective sensor for determining the refractive index (RI) variation of a sensing medium. How to further improve its sensitivity is a very interesting and important issue. In this paper, we theoretically propose a weak measurement method for enhancing the sensitivity of the photonic SHE-based RI sensor by reducing the influence of the in-plane wavevector. Of particular interest, our results indicate that the sensitivity of the presented configuration reaches about 3.16 × 10-7 RIU/μ m which shows nearly two orders of magnitude improvement compared with the conventional one. Remarkably, this method can be applied for wide range of RI variation of the sensing medium while keeping the high sensitivity. © 2009-2012 IEEE.
语种：
英文
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Photonic spin Hall effect enabled refractive index sensor using weak measurements
作者：
Zhou, Xinxing* ;Sheng, Lijuan;Ling, Xiaohui*
期刊：
Scientific Reports ,2018年8(1):1221 ISSN：2045-2322
通讯作者：
Zhou, Xinxing;Ling, Xiaohui
作者机构：
[Zhou, Xinxing; Sheng, Lijuan] Hunan Normal Univ, Coll Phys & Informat Sci, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
通讯机构：
[Zhou, Xinxing; Ling, Xiaohui] H;Hunan Normal Univ, Coll Phys & Informat Sci, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China.;Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
摘要：
In this work, we theoretically propose an optical biosensor (consists of a BK7 glass, a metal film, and a graphene sheet) based on photonic spin Hall effect (SHE). We establish a quantitative relationship between the spin-dependent shift in photonic SHE and the refractive index of sensing medium. It is found that, by considering the surface plasmon resonance effect, the refractive index variations owing to the adsorption of biomolecules in sensing medium can effectively change the spin-dependent displacements. Remarkably, using the weak measurement method, this tiny spin-dependent shifts can be detected with a desirable accuracy so that the corresponding biomolecules concentration can be determined.
语种：
英文
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Analytic expression and propagation properties of hollow Gaussian beams for the off-waist incident case in strongly nonlocal media
作者：
Dai, Zhiping;Ling, Xiaohui;Tang, Shiqing*
期刊：
Results in Physics ,2018年9:215-217 ISSN：2211-3797
通讯作者：
Tang, Shiqing
作者机构：
[Dai, Zhiping; Tang, Shiqing; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Tang, Shiqing] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
关键词：
Hollow Gaussian beam;Strongly nonlocal media;Propagation property;Off-waist incident case
摘要：
In this paper, the propagation properties of hollow Gaussian beams (HGBs) are discussed in detail when they are off-waist incident in strongly nonlocal media. A set of mathematic expressions are given to describe the evolutions of the beam intensity, the beam width, and the real beam radius. Numerical simulations are carried out to illustrate these propagation properties depended on the off-waist incidence. It is found that a HGB always periodically transforms its transverse patterns during propagation. Accordingly, the beam width and the real beam radius are also periodic during propagation.
语种：
英文
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