Wavenumber-Splitting Metasurfaces Achieve Multichannel Diffusive Invisibility
作者：
Xu, He-Xiu* ;Zhang, Lei;Kim, Yongjune;Wang, Guang-Ming;Zhang, Xiao-Kuan;...
期刊：
Advanced Optical Materials ,2018年6(10):1800010- ISSN：2195-1071
通讯作者：
Xu, He-Xiu;Qiu, Cheng-Wei
作者机构：
[Qiu, Cheng-Wei; Chen, Zhining; Xu, He-Xiu; Xu, HX; Qiu, CW; Ling, Xiaohui; Kim, Yongjune] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore.;[Wang, Guang-Ming; Xu, He-Xiu; Zhang, Xiao-Kuan] 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, Hengyang 421002, Peoples R China.;[Zhang, Lei] Xi An Jiao Tong Univ, Key Lab Phys Elect & Devices, Minist Educ, Xian 710049, Peoples R China.;[Zhang, Lei] Xi An Jiao Tong Univ, Shaanxi Key Lab Informat Photon Tech, Xian 710049, Peoples R China.
通讯机构：
[Xu, HX; Qiu, CW] N;Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore.
关键词：
bifunctionality;metasurfaces;multiband invisibility;parabolic phase;wavenumber-splitting
摘要：
The emerging invisibility schemes mainly adopt transformation optics, scattering cancellation, light diffusion, and metasurface-based phase restoration techniques. However, those aforementioned invisibility achievements natively depend on the predefined curvature, polarization, frequency, and/or angle of the incident wave. Here, an invisibility strategy of using an ultrathin parabolic-phase metasurface and its applications to achieve diffusive invisibility for dual-polarization channels and multifrequency channels is reported. Such strategy can intrinsically split the wavenumber of the scattering wave and therein is termed as wavenumber-splitting metasurface. For verification, two proof-of-concept examples are experimentally characterized. The first prototype manifests dual-polarized near-isotropic diffusive scattering immune from wide-angle incidences. The second demonstration exhibits bifunctionality of combined diffusive invisibility and vortex scattering in dual-polarization channels. In both cases, theoretical, numerical and experimental results agree well, illustrating a well-separated triple-band versatile scattering behavior. This approach addresses the fundamental issue of real invisibility under bistatic detection without complex optimization, thanks to the physical essence of numerous splitting wave vectors. Such strategy opens an upstream way to realize invisibility as well as holding the potentials for downstream applications such as stealth and camouflaging devices. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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英文
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Recent advances in the spin Hall effect of light
作者：
Ling, Xiaohui;Zhou, Xinxing;Huang, Kun;Liu, Yachao;Qiu, Cheng-Wei* ;...
期刊：
Reports on Progress in Physics ,2017年80(6):066401 ISSN：0034-4885
通讯作者：
Qiu, Cheng-Wei
作者机构：
[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.;[Qiu, Cheng-Wei; Ling, Xiaohui] Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117576, Singapore.;[Wen, Shuangchun; Luo, Hailu; Ling, Xiaohui; Liu, Yachao] Hunan Univ, Sch Phys & Elect, Minist Educ, Lab Micro Nanooptoelect Devices, Changsha 410082, Hunan, Peoples R China.;[Zhou, Xinxing] Hunan Normal Univ, Coll Phys & Informat Sci, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China.;[Huang, Kun] Agcy Sci Technol & Res, Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore.
通讯机构：
[Qiu, Cheng-Wei] N;[Qiu, Cheng-Wei] S;Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117576, Singapore.;Shenzhen Univ, SZU NUS Collaborat Innovat Ctr Optoelect Sci & Te, Shenzhen 518060, Peoples R China.;NUS Suzhou Res Inst NUSRI, Suzhou Ind Pk, Suzhou 215123, Peoples R China.
关键词：
geometric phase;spin Hall effect of light;spin Hall shift;weak measurements
摘要：
The spin Hall effect (SHE) of light, as an analogue of the SHE in electronic systems, is a promising candidate for investigating the SHE in semiconductor spintronics/valleytronics, high-energy physics and condensed matter physics, owing to their similar topological nature in the spin-orbit interaction. The SHE of light exhibits unique potential for exploring the physical properties of nanostructures, such as determining the optical thickness, and the material properties of metallic and magnetic thin films and even atomically thin two-dimensional materials. More importantly, it opens a possible pathway for controlling the spin states of photons and developing next-generation photonic spin Hall devices as a fundamental constituent of the emerging spinoptics. In this review, based on the viewpoint of the geometric phase gradient, we give a detailed presentation of the recent advances in the SHE of light and its applications in precision metrology and future spin-based photonics. © 2017 IOP Publishing Ltd.
语种：
英文
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Polarization evolution of vector beams generated by q-plates
作者：
Shu, Weixing* ;Ling, Xiaohui;Fu, Xiquan;Liu, Yachao;Ke, Yougang;...
期刊：
光子学研究(英文) ,2017年5(2):64-72 ISSN：2327-9125
通讯作者：
Shu, Weixing
作者机构：
[Shu, Weixing; Fu, Xiquan] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China.;[Luo, Hailu; Ling, Xiaohui; Liu, Yachao; Ke, Yougang] Hunan Univ, Sch Phys & Elect, Lab Spin Photon, Changsha 410082, Hunan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Shu, Weixing] H;Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Azimuthally polarized beams;Circular polarization;Diffraction theory;Optical data storage;Quantum optics;Vector beams
摘要：
The polarization evolution of vector beams (VBs) generated by q-plates is investigated theoretically and experimentally. An analytical model is developed for the VB created by a general quarter-wave q-plate based on vector diffraction theory. It is found that the polarization distribution of VBs varies with position and the value q. In particular, for the incidence of circular polarization, the exit vector vortex beam has polarization states that cover the whole surface of the Poincare sphere, thereby constituting a full Poincare beam. For the incidence of linear polarization, the VB is not cylindrical but specularly symmetric, and exhibits an azimuthal spin splitting. These results are in sharp contrast with those derived by the commonly used model, i.e., regarding the incident light as a plane wave. By implementing q-plates with dielectric metasurfaces, further experiments validate the theoretical results. (C) 2017 Chinese Laser Press
语种：
英文
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Manipulation of full Poincaré beams on a hybrid Poincaré sphere
作者：
Ling, Xiaohui* ;Yi, Xunong;Dai, Zhiping;Wang, Youwen;Chen, Liezun
期刊：
Proceedings of SPIE - The International Society for Optical Engineering ,2017年10022 ISSN：0277-786X
通讯作者：
Ling, Xiaohui
作者机构：
[Wang, Youwen; Chen, Liezun; Dai, Zhiping; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.;[Yi, Xunong] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
通讯机构：
[Ling, Xiaohui] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
会议名称：
Conference on Holography, Diffractive Optics, and Applications VII
会议时间：
OCT 12-14, 2016
会议地点：
Beijing, PEOPLES R CHINA
会议主办单位：
[Ling, Xiaohui;Dai, Zhiping;Wang, Youwen;Chen, Liezun] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.^[Yi, Xunong] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
会议论文集名称：
Proceedings of SPIE
关键词：
Polarization;Poincare sphere;full Poincare beam
摘要：
We present a hybrid Poincarésphere, whose eigenstates are defined as a pair of circularly polarized fundamental-mode Gaussian beam and a Laguerre-Gaussian beam, to describe the so-called full Poincarébeam. We also show that any desired full Poincarébeam over the hybrid Poincarésphere via modulating the incident polarization state of light and two cascaded half-wave plates. This research provides an alternative way for charactering and manipulating the full Poincarébeam and an effective method to control the polarization state of light. ©2016 SPIE.
语种：
英文
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Tripole-mode and quadrupole-mode solitons in (1+1)-dimensional nonlinear media with a spatial exponentialdecay nonlocality
作者：
Dai, Zhiping;Yang, Zhenjun* ;Ling, Xiaohui;Zhang, Shumin;Pang, Zhaoguang;...
期刊：
Scientific Reports ,2017年7(1):122 ISSN：2045-2322
通讯作者：
Yang, Zhenjun
作者机构：
[Wang, Youwen; Dai, Zhiping; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Yang, Zhenjun; Li, Xingliang; Zhang, Shumin; Pang, Zhaoguang] Hebei Normal Univ, Coll Phys & Informat Engn, Hebei Adv Thin Films Lab, Shijiazhuang 050024, Peoples R China.
通讯机构：
[Yang, Zhenjun] H;Hebei Normal Univ, Coll Phys & Informat Engn, Hebei Adv Thin Films Lab, Shijiazhuang 050024, Peoples R China.
摘要：
The approximate analytical expressions of tripole-mode and quadrupole-mode solitons in (1 + 1)-dimensional nematic liquid crystals are obtained by applying the variational approach. It is found that the soliton powers for the two types of solitons are not equal with the same parameters, which is much different from their counterparts in the Snyder-Mitchell model (an ideal and typical strongly nolocal nonlinear model). The numerical simulations show that for the strongly nonlocal case, by expanding the response function to the second order, the approximate soliton solutions are in good agreement with the numerical results. Furthermore, by expanding the respond function to the higher orders, the accuracy and the validity range of the approximate soliton solutions increase. If the response function is expanded to the tenth order, the approximate solutions are still valid for the general nonlocal case.
语种：
英文
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Geometric spin Hall effect of light with inhomogeneous polarization
作者：
Ling, Xiaohui* ;Zhou, Xinxing;Yi, Xunong
期刊：
Optics Communications ,2017年383:412-417 ISSN：0030-4018
通讯作者：
Ling, Xiaohui
作者机构：
[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.;[Zhou, Xinxing] Hunan Normal Univ, Coll Phy & Informat Sci, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China.;[Yi, Xunong] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
通讯机构：
[Ling, Xiaohui] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
关键词：
Spin Hall effect of light;Spin-dependent shift;Polarization;Geometric phase
摘要：
The spin Hall effect of light originates from spin-orbit interaction of light, which manifests two types of geometric phases. In this paper, we report the observation of a geometric spin Hall effect by generating a light beam with inhomogeneous polarization distribution. Unlike the previously reported geometric spin Hall effect observed in a tilted beam-detector system, which is believed to result from an effective spin redirection Berry geometric phase, the geometric spin Hall effect demonstrated here is attributed to an effective, spatially varying Pancharatnam-Berry geometric phase generated by the inhomogeneous polarization geometry. Our further experiments show that the geometric spin Hall effect can be tuned by tailoring the polarization geometry of light, demonstrating the spin states of photons can be steered with a great flexibility. (C) 2016 Elsevier B.V. All rights reserved.
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英文
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基于Pancharatnam-Berry相位调控产生贝塞尔光束
作者：
Chen Huan;Ling Xiao-Hui;He Wu-Guang;Li Qian-Guang;Yi Xu-Nong*
期刊：
物理学报 ,2017年66(4):044203-1-044203-6 ISSN：1000-3290
通讯作者：
Yi Xu-Nong
作者机构：
[Yi Xu-Nong; He Wu-Guang; Li Qian-Guang; Chen Huan] Hubei Engn Univ, Coll Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;[Ling Xiao-Hui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Yi Xu-Nong] H;Hubei Engn Univ, Coll Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
关键词：
贝塞尔光束;Pancharatnam-Berry相位;超表面
摘要：
提出了一种基于Pancharatnam-Berry相位设计制作的超表面平面轴棱锥透镜产生贝塞尔光束的方法.理论分析表明:由于Pancharatnam-Berry相位的自旋相关性,设计的平面轴棱锥透镜需采用左旋圆偏振光入射才能有效地产生贝塞尔光束.超表面微结构单元的旋转率与最大无衍射距离成反比,这提供了一个获得更大无衍射距离的方便的途径.最后,搭建了一套基于平面轴棱锥透镜的贝塞尔光束产生系统,实验结果与数值模拟结果一致.这些结论有助于设计制作更多新颖的基于Pancharatnam-Berry相位的平面光子学器件.
语种：
中文
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Generation and representation of vector vortex beams based on metasurfaces
作者：
Yi, Xunogn* ;Ling, Xiaohui;He, Wuguang;Lv, Hao;Yu, Huaqing;...
期刊：
Proceedings of SPIE - The International Society for Optical Engineering ,2017年10022 ISSN：0277-786X
通讯作者：
Yi, Xunogn
作者机构：
[He, Wuguang; Chen, Huan; Lv, Hao; Yi, Xunogn; Yu, Huaqing] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Chen, Huan] Hubei Engn Univ, Hubei Key Lab Qual Control Characterist Fruits &, Xiaogan 432000, Peoples R China.
通讯机构：
[Yi, Xunogn] H;Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
会议名称：
Conference on Holography, Diffractive Optics, and Applications VII
会议时间：
OCT 12-14, 2016
会议地点：
Beijing, PEOPLES R CHINA
会议主办单位：
[Yi, Xunogn;He, Wuguang;Lv, Hao;Yu, Huaqing;Chen, Huan] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.^[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.^[Chen, Huan] Hubei Engn Univ, Hubei Key Lab Qual Control Characterist Fruits &, Xiaogan 432000, Peoples R China.
会议论文集名称：
Proceedings of SPIE
关键词：
Metasurface;vector vortex beam;Poincare sphere
摘要：
In this work, we present a method for generating vector vortex beams with metasurfaces. A Jones calculation is employed to theoretically analyze the phase and polarization transformation from metasurfaces. The experimental results are shown to agree well with our theoretical calculation. Lastly, as a geometrical representation, the hybrid-order Poincaré sphere is proposed to describe the evolution of polarization state and phase of light wave propagating in metasurfaces. The hybrid-order Poincaré sphere can intuitively demonstrate the change of polarization state and. So it can also become an effective tool to provide help in designing metasurfaces.
语种：
英文
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Generation of double-ring-shaped cylindrical vector beams by modulating Pancharatnam–Berry phase
作者：
Chen, Huan;Ling, Xiaohui;Li, Qianguang;Lv, Hao;Yu, Huaqing;...
期刊：
Optik ,2017年134:227-232 ISSN：0030-4026
通讯作者：
Yi, Xunong
作者机构：
[Li, Qianguang; Chen, Huan; Yi, Xunong; Lv, Hao; Yu, Huaqing] Hubei Engn Univ, Coll Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421002, Peoples R China.;[Chen, Huan; Yi, Xunong] Hubei Engn Univ, Hubei Key Lab Qual Control Characterist Fruits &, Xiaogan 432000, Peoples R China.
通讯机构：
[Yi, Xunong] H;Hubei Engn Univ, Coll Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
关键词：
Vector beam;Pancharatnam-Berry phase;Jones matrix
摘要：
In this work, we propose a method for generating double-ring-shaped cylindrical vector beams by modulating Pancharatnam-Berry phase (PBP). The theoretical analysis shows that the output field can be expressed as the coherent superposition of two circularly polarized Laguerre-Gaussian components with opposite polarization handness and opposite helical index when a linearly polarized fundamental Gaussian beam inputs the metasurface designed based on PBP. Such a superposition of Laguerre-Gaussian modes forms a double ring-shaped cylindrical vector beam. Additionally, the local polarization orientation can be manipulated by changing the polarization angle of the input field. Our experimental results agree well with the theoretical expectation. We believe that PBP provides an extra choice to manipulate the phase and polarization of optical field. (C) 2017 Elsevier GmbH. All rights reserved.
语种：
英文
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Broadband Vortex Beam Generation Using Multimode Pancharatnam-Berry Metasurface
作者：
Xu, He-Xiu* ;Liu, Haiwen;Ling, Xiaohui;Sun, Yunming;Yuan, Fang
期刊：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION ,2017年65(12):7378-7382 ISSN：0018-926X
通讯作者：
Xu, He-Xiu
作者机构：
[Xu, He-Xiu; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Yuan, Fang; Xu, He-Xiu] Air Force Engn Univ, Air & Missile Def Coll, Xian 710051, Shaanxi, Peoples R China.;[Liu, Haiwen] East China Jiaotong Univ, Sch Informat Engn, Nanchang 330013, Jiangxi, Peoples R China.;[Sun, Yunming] Adv Tech Dept, Key Lab Aeronaut Comp Tech, Xian 710175, Shaanxi, Peoples R China.
通讯机构：
[Xu, He-Xiu] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
关键词：
Circular polarization;metasurface;orbital angular momentum (OAM);Pancharatnam-Berry phase (PB);vortex beam
摘要：
Vortex beams have been extensively realized using different approaches. Typically, the efficiency and bandwidth of a vortex beam are limited by impure copolarized components and the intrinsic dispersion of passive resonant structures. Here, we propose a strategy to generate wideband vortex beams by using a Pancharatnam-Berry metasurface in which two orthogonal reflections exhibit a broadband out-of-phase difference. To achieve this, a broadband strategy based on multimode operation and dispersion engineering methods was established. A dual-layer meta-atom is proposed; each layer comprises of five metallic dipoles, and the geometrical parameters are carefully adjusted to tune the resonant frequencies. Because the dipole orientations in each layer are orthogonal, the reflection responses under the two orthogonal polarizations can be independently engineered. Both numerical and experimental results indicate that our method not only enables a high-efficiency spiral beam conversion over a broad range of 6.95-18 GHz (>82%) but also causes a polarization-insensitive effect; thus, it can be adapted for any linear or circular polarization. © 1963-2012 IEEE.
语种：
英文
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Measurements of Pancharatnam-Berry phase in mode transformations on hybrid-order Poincare sphere
作者：
Liu, Yuanyuan;Liu, Zhenxing;Zhou, Junxiao;Ling, Xiaohui;Shu, Weixing;...
期刊：
Optics Letters ,2017年42(17):3447-3450 ISSN：0146-9592
通讯作者：
Luo, Hailu
作者机构：
[Zhou, Junxiao; Shu, Weixing; Wen, Shuangchun; Luo, Hailu; Liu, Yuanyuan; Liu, Zhenxing] Hunan Univ, Sch Phys & Elect, Lab Spin Photon, Changsha 410082, Hunan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Luo, Hailu] H;Hunan Univ, Sch Phys & Elect, Lab Spin Photon, Changsha 410082, Hunan, Peoples R China.
关键词：
Berry phase;Cylindrical lenses;Cylindrical vector beams;Michelson interferometers;Phase measurement;Wave propagation
摘要：
We report direct measurements of the Pancharatnam–Berry (PB) phase in mode transformations on a hybrid-order Poincaré sphere. This geometric phase arises when the vector vortex states undergo a cyclic transformation over a closed circuit on a hybrid-order Poincaré sphere. The measured PB phase is proportional to the solid angle of the closed circuit, as well as to the variation of the total angular momenta between north and south poles. More importantly, a zero PB phase has been demonstrated, despite the vector vortex states taken through a closed circuit on the hybrid-order Poincaré sphere. This interesting phenomenon can be explained as being due to the zero Berry curvature. © 2017 Optical Society of America.
语种：
英文
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Precise identification of graphene layers at the air-prism interface via a pseudo-Brewster angle
作者：
Mi, Chengquan;Chen, Shizhen;Wu, Weijie;Zhang, Wenshuai;Zhou, Xinxing;...
期刊：
Optics Letters ,2017年42(20):4135-4138 ISSN：0146-9592
通讯作者：
Luo, Hailu
作者机构：
[Wu, Weijie; Shu, Weixing; Wen, Shuangchun; Zhang, Wenshuai; Luo, Hailu; Mi, Chengquan; Chen, Shizhen] Hunan Univ, Lab Spin Photon, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.;[Zhou, Xinxing] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Coll Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Luo, Hailu] H;Hunan Univ, Lab Spin Photon, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.
关键词：
Atomic force microscopy;Fresnel reflection;Graphene;Optical constants;Optical properties;Reflection coefficient
摘要：
We propose a simple method for the precise identification of graphene layers at the air-prism interface via a pseudo-Brewster angle, where the horizontally polarized reflection is close to zero. We find that the pseudo-Brewster angle is sensitive to the variation of graphene layers where the pseudo-Brewster angle is approximately linearly increased about 0.5 deg as the layer numbers increased. Furthermore, the sensitivity of the pseudo-Brewster angle can be greatly enhanced and reaches 0.04 deg by eliminating the influence of the cross-polarization effect. Our scheme can provide a simple and effective method to identify the layer numbers of graphene. ©2017 Optical Society of America.
语种：
英文
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Enhanced photonic spin hall effect due to surface plasmon resonance
作者：
Zhou, Xinxing* ;Ling, Xiaohui*
期刊：
IEEE PHOTONICS JOURNAL ,2016年8(1):1-8 ISSN：1943-0655
通讯作者：
Zhou, Xinxing;Ling, Xiaohui
作者机构：
[Zhou, Xinxing] 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, Lab Opt & Optoelect, 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, Lab Opt & Optoelect, Hengyang 421002, Peoples R China.
关键词：
Photonic spin Hall effect (SHE);spin-dependent splitting;surface plasmon resonance (SRP)
摘要：
In this paper, by considering the surface plasmon resonance (SPR) effect, we theoretically study the photonic spin Hall effect (SHE) in a three-layer structure composed of glass, metal, and air. It is revealed that the obtained spin-dependent splitting in photonic SHE is far greater than the previously reported results in refraction when the incident angle is near the resonant angle. The inherent physics behind this interesting phenomenon is attributed to the sharp decrease in Fresnel reflective coefficients around the SPR. We also find that there exists an optimal thickness for minimal resonant reflection, above which the huge beam displacement is also observed. These findings provide us a pathway for modulating the photonic SHE and open the possibility of developing nanophotonic applications such as the SPR-based sensor. © 2009-2012 IEEE.
语种：
英文
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A method for generating double-ring-shaped vector beams
作者：
Chen, Huan;Ling, Xiao-Hui;Chen, Zhi-Hong;Li, Qian-Guang;Lv, Hao;...
期刊：
中国物理B ,2016年25(7):074201-1-074201-5 ISSN：1674-1056
通讯作者：
Yi, Xu-Nong
作者机构：
[Yi, Xu-Nong; Yu, Hua-Qing; Chen, Huan; Lv, Hao; Chen, Zhi-Hong; Li, Qian-Guang] Hubei Engn Univ, Coll Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;[Ling, Xiao-Hui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421002, Peoples R China.
通讯机构：
[Yi, Xu-Nong] H;Hubei Engn Univ, Coll Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.
关键词：
vector beam;Pancharatnam–Berry phase element;geometric phase
摘要：
We propose a method for generating double-ring-shaped vector beams. A step phase introduced by a spatial light modulator (SLM) first makes the incident laser beam have a nodal cycle. This phase is dynamic in nature because it depends on the optical length. Then a Pancharatnam-Berry phase (PBP) optical element is used to manipulate the local polarization of the optical field by modulating the geometric phase. The experimental results show that this scheme can effectively create double-ring-shaped vector beams. It provides much greater flexibility to manipulate the phase and polarization by simultaneously modulating the dynamic and the geometric phases. © 2016 Chinese Physical Society and IOP Publishing Ltd.
语种：
英文
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Motion of soliton center of interactional solitons in nonlinear media with an exponential nonlocal response
作者：
Dai, Zhiping;Yang, Zhenjun* ;Ling, Xiaohui;Zhang, Shumin;Pang, Zhaoguang;...
期刊：
Optics Communications ,2016年367:305-311 ISSN：0030-4018
通讯作者：
Yang, Zhenjun
作者机构：
[Dai, Zhiping; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Yang, Zhenjun; Zhang, Shumin; Pang, Zhaoguang; Li, Jianxing] Hebei Normal Univ, Coll Phys & Informat Engn, Hebei Adv Thin Films Lab, Shijiazhuang 050024, Peoples R China.
通讯机构：
[Yang, Zhenjun] H;Hebei Normal Univ, Coll Phys & Informat Engn, Hebei Adv Thin Films Lab, Shijiazhuang 050024, Peoples R China.
关键词：
Spatial nonlocality;Soliton interaction;Nonlinear propagation
摘要：
The motion of two interactional solitons is investigated in nonlinear media with an exponential nonlocal response. A differential equation describing the motion trajectories of soliton center is proposed. Some numerical simulations are performed to illustrate the characteristics of the motion trajectories. The results show that the trajectories always oscillate periodically. However, if the two solitons are launched with a relative inclined angle which is larger than a critical value, they do not collide any more but diverge from each other. The critical angle is also given. (C) 2016 Elsevier B.V. All rights reserved.
语种：
英文
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Effect of nonlinearity saturation on hot-image formation in cascaded saturable nonlinear medium slabs
作者：
Wang, Youwen* ;Dai, Zhiping;Ling, Xiaohui;Chen, Liezun;Lu, Shizhuan;...
期刊：
Proceedings of SPIE - The International Society for Optical Engineering ,2016年10016 ISSN：0277-786X
通讯作者：
Wang, Youwen
作者机构：
[Wang, Youwen; Lu, Shizhuan; Chen, Liezun; Dai, Zhiping; Ling, Xiaohui; You, Kaiming] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Wang, Youwen] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
会议名称：
Conference on High-Power Lasers and Applications VIII
会议时间：
OCT 12-14, 2016
会议地点：
Beijing, PEOPLES R CHINA
会议主办单位：
[Wang, Youwen;Dai, Zhiping;Ling, Xiaohui;Chen, Liezun;Lu, Shizhuan;You, Kaiming] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
会议论文集名称：
Proceedings of SPIE
关键词：
High-power laser;hot image;nonlinear propagation;saturable nonlinearity
摘要：
In high-power laser system such as Petawatt lasers, the laser beam can be intense enough to result in saturation of nonlinear refraction index of medium. Based on the standard linearization method of small-scale self-focusing and the split-step Fourier numerical calculation method, we present analytical and simulative investigations on the hot-image formation in cascaded saturable nonlinear medium slabs, to disclose the effect of nonlinearity saturation on the distribution and intensity of hot images. The analytical and simulative results are found in good agreement. It is shown that, saturable nonlinearity does not change the distribution of hot images, while may greatly affect the intensity of hot images, i.e., for a given saturation light intensity, with the intensity of the incident laser beam, the intensity of hot images firstly increases monotonously and eventually reaches a saturation; for the incident laser beam of a given intensity, with the saturation light intensity lowering, the intensity of hot images decreases rapidly, even resulting in a few hot images too weak to be visible.
语种：
英文
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Flat Helical Nanosieves
作者：
Mei, Shengtao;Mehmood, Muhammad Qasim;Hussain, Sajid;Huang, Kun;Ling, Xiaohui;...
期刊：
Advanced Functional Materials ,2016年26(29):5255-5262 ISSN：1616-301X
通讯作者：
Qiu, Cheng-Wei
作者机构：
[Qiu, Cheng-Wei; Mehmood, Muhammad Qasim; Siew, Shawn Yohanes; Mei, Shengtao; Hussain, Sajid; Danner, Aaron; Ling, Xiaohui] Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore.;[Qiu, Cheng-Wei; Mei, Shengtao] Natl Univ Singapore, Grad Sch Integrat Sci & Engn, Ctr Life Sci CeLS, 05-01,28 Med Dr, Singapore 117456, Singapore.;[Mehmood, Muhammad Qasim] Informat Technol Univ, 346-B Ferozepur Rd, Lahore 54600, Pakistan.;[Teng, Jinghua; Liu, Hong; Huang, Kun] ASTAR, Inst Mat Res & Engn, 08-03,2 Fusionopolis Way, Singapore 138634, Singapore.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Qiu, Cheng-Wei] N;Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore.;Natl Univ Singapore, Grad Sch Integrat Sci & Engn, Ctr Life Sci CeLS, 05-01,28 Med Dr, Singapore 117456, Singapore.
关键词：
flat helical devices;multifunctional;nanosieves;vortex
摘要：
Compact and miniaturized devices with flexible functionalities are always highly demanded in optical integrated systems. Plasmonic nanosieve has been successfully harnessed as an ultrathin flat platform for complex manipulation of light, including holography, vortex generation, and nonlinear processes. Compared with most of the reported single-functional devices, multifunctional nanosieves might find more complex and novel applications across nanophotonics, optics, and nanotechnology. Here, a promising roadmap for nanosieve-based helical devices is experimentally demonstrated, which achieves full manipulations of optical vortices, including its generation, hybridization, spatial multiplexing, focusing and nondiffraction propagation, etc., by controlling the geometric phase of spin light via over 121 thousands of spatially rotated nanosieves. Thanks to such spin-conversion nanosieve helical elements, it is no longer necessary to employ the conventional two-beam interferometric measurement to characterize optical vortices, while the interference can be realized natively without changing any parts of the current setup. The proposed strategy makes the far-field manipulations of optical orbital angular momentum within an ultrathin interface viable and bridges singular optics and integrated optics. In addition, it enables more unique extensibility and flexibility in versatile optical elements than traditional phase-accumulated helical optical devices. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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Interaction trajectory of solitons in nonlinear media with an arbitrary degree of nonlocality
作者：
Dai, Zhiping;Yang, Zhenjun* ;Ling, Xiaohui;Zhang, Shumin;Pang, Zhaoguang
期刊：
Annals of Physics ,2016年366:13-21 ISSN：0003-4916
通讯作者：
Yang, Zhenjun
作者机构：
[Dai, Zhiping; Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Yang, Zhenjun; Zhang, Shumin; Pang, Zhaoguang] Hebei Normal Univ, Hebei Adv Thin Films Lab, Coll Phys & Informat Engn, Shijiazhuang 050024, Peoples R China.
通讯机构：
[Yang, Zhenjun] H;Hebei Normal Univ, Hebei Adv Thin Films Lab, Coll Phys & Informat Engn, Shijiazhuang 050024, Peoples R China.
关键词：
Interaction trajectory;Nonlocal nonlinear media;Optical soliton;Propagation
摘要：
The interaction trajectory of solitons in nonlocal nonlinear media is investigated. A simple differential equation describing the interaction trajectories is derived based on the light ray equation. Numerical calculations are carried out to illustrate the interaction trajectories with different parameters. The results show that the degree of nonlocality greatly affects the interaction of solitons. For a strongly nonlocal case, the interaction trajectory can be described by a cosine function. Analytical expressions describing the trajectory and the oscillation period are obtained. For generally and weakly nonlocal cases, the interaction trajectories still oscillate periodically, however it is no longer sinusoidal and the oscillation period increases with the nonlocal degree decreasing. In addition, the trajectory of two solitons launched with a relative angle at the entrance plane is investigated. It is found that there exists a critical angle. When the initial relative angle is larger than the critical angle, the two solitons do not collide on propagation. The influence of the degree of nonlocality on the critical angle is also discussed. © 2016 Elsevier Inc.
语种：
英文
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Unveiling the photonic spin Hall effect with asymmetric spin-dependent splitting
作者：
Zhou, Xinxing;Ling, Xiaohui*
期刊：
Optics Express ,2016年24(3):3025-3036 ISSN：1094-4087
通讯作者：
Ling, Xiaohui
作者机构：
[Zhou, Xinxing] Hunan Normal Univ, Coll Phys & Informat Sci, Changsha 10081, Hunan, Peoples R China.;[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Lab Opt & Optoelect, Hengyang 421002, Peoples R China.
通讯机构：
[Ling, Xiaohui] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Lab Opt & Optoelect, Hengyang 421002, Peoples R China.
关键词：
Berry phase;Light beams;Phase shift;Photons;Physical optics;Polarization
摘要：
The photonic spin Hall effect (SHE) manifests itself as the spin-dependent splitting of light beam. Usually, it shows a symmetric spin-dependent splitting, i.e., the left- and right-handed circularly polarized components are equally separated in position and intensity for linear polarization incidence. In this paper, we theoretically propose an asymmetric spin-dependent splitting at an air-glass interface under the illumination of elliptical polarization beam and experimentally demonstrate it with the weak measurement method. The left- and right-handed circularly polarized components show expectedly unequal intensity distributions and unexpectedly different spin-dependent shifts. Remarkably, the asymmetric spin-dependent splitting can be modulated by adjusting the handedness of incident polarization. The inherent physics behind this interesting phenomenon is attributed to the additional spatial Imbert-Fedorov shift. These findings offer us potential methods for developing new spin-based nanophotonic applications. ©2016 Optical Society of America.
语种：
英文
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Geometric phase gradient and spin Hall effect of light
作者：
Ling, Xiaohui* ;Zhou, Xinxing;Qiu, Cheng-Wei
期刊：
Proceedings of SPIE - The International Society for Optical Engineering ,2016年9931 ISSN：0277-786X
通讯作者：
Ling, Xiaohui
作者机构：
[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Zhou, Xinxing] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Coll Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China.;[Qiu, Cheng-Wei] Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117576, Singapore.
通讯机构：
[Ling, Xiaohui] H;Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
会议名称：
9th Spintronics Symposium / SPIE Conference
会议时间：
AUG 28-SEP 01, 2016
会议地点：
San Diego, CA
会议主办单位：
[Ling, Xiaohui] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.^[Zhou, Xinxing] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Coll Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China.^[Qiu, Cheng-Wei] Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117576, Singapore.
会议论文集名称：
Proceedings of SPIE
关键词：
Geometric phase gradient;Spin Hall effect of light;Metamaterial
摘要：
The spin Hall effect (SHE) of light originates from the spin-orbit interaction, which can be explained in terms of two geometric phases: the Rytov-Vladimirskii-Berry phase and the Pancharatnam-Berry phase. Here we present a unified theoretical description of the SHE based on the two types of geometric phase gradients, and observe experimentally the SHE in structured dielectric metasurfaces induced by the PB phase. Unlike the weak real-space spin-Hall shift induced by the SRB phase occurring at interfacial reflection/refraction, the observed SHE occurs in momentum space is large enough to be measured directly.
语种：
英文
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