作者机构：
[Qiu, Cheng-Wei; Mei, Shengtao; Mehmood, M.Q.; Siew, S.Y.; Zhang, Lei; Zhang, Tianhang; Danner, Aaron; Hussain, Sajid; Ling, Xiaohui] Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, Singapore;[Qiu, Cheng-Wei; Mei, Shengtao] Graduate School for Integrative Sciences and Engineering, National University of Singapore, Centre for Life Sciences (CeLS), #05-01, 28 Medical Drive, Singapore, Singapore;[Liu, Hong; Huang, Kun; Teng, Jinghua] Institute of Materials Research, Engineering Agency for Science Technology and Research (ASTAR) Innovis, #08-03 2 Fusionopolis Way, Singapore, Singapore;[Ling, Xiaohui] College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang, China;[Zhang, Shuang] School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom
通讯机构：
[Qiu, Cheng-Wei] Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore.;[Qiu, Cheng-Wei] Natl Univ Singapore, Ctr Life Sci CeLS, Grad Sch Integrat Sci & Engn, 05-01,28 Med Dr, Singapore 117456, Singapore.
作者机构：
[Zhou, Xinxing; Liu, Yachao; Luo, Hailu; Shu, Weixing; Ling, Xiaohui; Wen, Shuangchun; Fan, Dianyuan; Chen, Shizhen] Laboratory for Spin Photonics, School of Physics and Electronics, Hunan University, Changsha, 410082, China;[Ling, Xiaohui; Yi, Xunong; Fan, Dianyuan] SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices, Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, 518060, China;[Ling, Xiaohui] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, 421002, China
关键词：
geometric phase;metamaterial;photonic spin Hall effect
摘要：
The photonic spin Hall effect (SHE) in the reflection and refraction at an interface is very weak because of the weak spin-orbit interaction. Here, we report the observation of a giant photonic SHE in a dielectric-based metamaterial. The metamaterial is structured to create a coordinate-dependent, geometric Pancharatnam-Berry phase that results in an SHE with a spin-dependent splitting in momentum space. It is unlike the SHE that occurs in real space in the reflection and refraction at an interface,which results from the momentum-dependent gradient of the geometric Rytov-Vladimirskii-Berry phase. We theorize a unified description of the photonic SHE based on the two types of geometric phase gradient, and we experimentally measure the giant spin-dependent shift of the beam centroid produced by the metamaterial at a visible wavelength. Our results suggest that the structured metamaterial offers a potential method of manipulating spin-polarized photons and the orbital angular momentum of light and thus enables applications in spin-controlled nanophotonics.
关键词：
spin Hall effect of light;spin Hall shift;geometric phase;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.
关键词：
Electronic band structure;Graphene;Doping;Density-functional theory
摘要：
A pathway to open the band gap of graphene by p-n codoping is presented according to the first principles study. Two models are used: Lithium adsorbed on Boron-doped graphene (BC) and Boron-Nitrogen (B/N) codoping into graphene. The stability of Lithium adsorbed on BC is firstly analyzed, showing that the hollow site is the most stable configuration, and there is no energy barrier from some metastable configurations to a stable one. After the p-n codoping, the electronic structures of graphene are modulated to open a band gap with width from 0.0 eV to 0.49 eV, depending on the codoping configurations. The intrinsic physical mechanism responsible for the gap opening is the combination of the Boron atom acting as hole doping and Nitrogen (Lithium) as electron doping. (C) 2011 Elsevier B.V. All rights reserved.
作者机构：
[Xia, Li-Xin] Department of Physics, Henan University of Science and Technology, Luoyang, 471003, China;[Zhang, Deng-Yu; Wang, Xin-Wen] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, 421008, China;[Wang, Zhi-Yong] National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China;[Wang, Xin-Wen] Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing, 100875, China
通讯机构：
[Wang, Xin-Wen] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词：
Multipartite entanglement;Quantum-information splitting;Asymmetric distribution
通讯机构：
[Wang, Xin-Wen] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词：
Coherent state - Even parity - Linear optical - Multiqubit gates - Non-Linearity - Odd-parity - Orders of magnitude - Photon interactions - Photon numbers - Physical resources - Polarization qubits - Polarized photons - Quantum Information - Ring cavities - Two photon - Two-qubit - Two-qubit gates
摘要：
The cross-Kerr nonlinearity (XKNL) effect can induce efficient photon interactions in principle with which photonic multiqubit gates can be performed using far fewer physical resources than linear optical schemes. Unfortunately, it is extremely challenging to generate giant cross-Kerr nonlinearities. In recent years much effort has been made to perform multiqubit gates via weak XKNLs. However, the required nonlinearity strengths are still difficult to achieve in an experiment. We here propose an XKNL-based scheme for realizing a two-photon polarization-parity gate, a universal two-qubit gate, in which the required strength of the nonlinearity could be orders of magnitude weaker than those required for previous schemes. The scheme utilizes a ring cavity fed by a coherent state as a quantum information bus which interacts with a path mode of the two polarized photons (qubits). The XKNL effect makes the bus pick up a phase shift dependent on the photon number of the path mode. Even when the potential phase shifts are very small they can be effectively measured using photon-number resolving detectors, which accounts for the fact that our scheme can work in the regime of tiny XKNL. The measurement outcome reveals the parity (even parity or odd parity) of the two polarization qubits.
期刊：
Journal of Materials Chemistry C,2015年3(22):5697-5702 ISSN：2050-7526
通讯作者：
Zeng, J
作者机构：
[Zeng, Jing] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, China;[Chen, Ke-Qiu] Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha, China
通讯机构：
[Zeng, Jing] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421002, Peoples R China.
关键词：
Armchair graphene nanoribbons - Conductance state - Metal electrodes - Non-equilibrium Green's function - Spin filtering - Spin-down state - Spintronic device - Zigzag graphene nanoribbons
期刊：
Computers and Graphics (Pergamon),2015年46:130-137 ISSN：0097-8493
通讯作者：
Chen, SF
作者机构：
[Fu, Hongbo] City University of Hong Kong, Hong Kong, Hong Kong;[Peng, Xiaojiang; Zou, Changqing] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, China;[Lv, Hao; Zou, Changqing; Chen, Shifeng] Shenzhen Key Lab of C.V.P.R., Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China;[Zou, Changqing] Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, China;[Liu, Jianzhuang] Media Laboratory, Huawei Technologies Co., Ltd., Shenzhen, China
通讯机构：
[Chen, Shifeng] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen Key Lab CVPR, Shenzhen, Peoples R China.
会议主办单位：
[Zou, Changqing;Peng, Xiaojiang] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang, Peoples R China.^[Zou, Changqing;Lv, Hao;Chen, Shifeng] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen Key Lab CVPR, Shenzhen, Peoples R China.^[Zou, Changqing] Univ Chinese Acad Sci, Shenzhen Coll Adv Technol, Beijing, Peoples R China.^[Fu, Hongbo] City Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China.^[Liu, Jianzhuang] Chinese Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China.^[Liu, Jianzhuang] Huawei Technol Co Ltd, Media Lab, Shenzhen, Peoples R China.
作者机构：
[Zhou, Xinxing; Liu, Yachao; Wen, Shuangchun; Luo, Hailu; Shu, Weixing; Ling, Xiaohui] Laboratory for Spin Photonics, College of Physics and Microelectronic Science, Hunan University, Changsha, China;[Luo, Hailu; Ling, Xiaohui; Yi, Xunong] SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China;[Ling, Xiaohui] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, China
期刊：
Journal of Physics B: Atomic, Molecular and Optical Physics,2013年46(2) ISSN：0953-4075
通讯作者：
Zhan, XG
作者机构：
[Yang, Xiaoxue; Zhan, Xiao-Gui; Si, Liu-Gang] Wuhan National Laboratory for Optoelectronics, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;[Zheng, An-Shou] College of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China;[Zhan, Xiao-Gui] Department of Physics and Electronic Information Science, Research Institute of Photoelectricity, Hengyang Normal University, Hengyang 421008, China
摘要：
Recent developments in the field of photonic spin Hall effect (SHE) offer new opportunities for advantageous measurement of the optical parameters (refractive index, thickness, etc.) of nanostructures and enable spin-based photonics applications in the future. However, it remains a challenge to develop a tunable photonic SHE with any desired spin-dependent splitting for generation and manipulation of spin-polarized photons. Here, we demonstrate experimentally a scheme to realize the photonic SHE tunably by tailoring the space-variant Pancharatnam-Berry phase (PBP). It is shown that light beams whose polarization with a tunable spatial inhomogeneity can contribute to steering the space-variant PBP which creates a spin-dependent geometric phase gradient, thereby possibly realizing a tunable photonic SHE with any desired spin-dependent splitting. Our scheme provides a convenient method to manipulate the spin photon. The results can be extrapolated to other physical system with similar topological origins.
期刊：
Results in Physics,2017年7:1485-1486 ISSN：2211-3797
通讯作者：
Yang, ZJ;Yang, ZF
作者机构：
[Li, Jian-Xing; Zhang, Shu-Min; Yang, Zhen-Jun; Li, Xing-Liang] Hebei Normal Univ, Coll Phys & Informat Engn, Hebei Adv Thin Films Lab, Shijiazhuang 050024, Hebei, Peoples R China.;[Dai, Zhi-Ping] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.;[Yang, Zhen-Feng] Hebei Univ Sci & Technol, Dept Informat Management, Shijiazhuang 050018, Hebei, Peoples R China.
通讯机构：
[Yang, Zhen-Feng] Hebei Univ Sci & Technol, Dept Informat Management, Shijiazhuang 050018, Hebei, Peoples R China.;[Yang, Zhen-Jun] Hebei Normal Univ, Coll Phys & Informat Engn, Hebei Adv Thin Films Lab, Shijiazhuang 050024, Hebei, Peoples R China.
关键词：
Interaction;Anomalous vortex beam;Nonlocal media
摘要：
In this paper, the interactional behaviors of anomalous vortex beams in highly nonlocal media are investigated. An analytical expression describing the interaction is given, and some numerical simulations are carried out to illustrate the interactional characteristics. It is found that two interactional anomalous vortex beams always attract each other, and their evolution is periodical. The influence of different relative phases between two anomalous vortex beams on their interaction is presented in details. (C) 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license
作者机构：
[Wang, Youwen; Dai, Zhiping; Ling, Xiaohui] College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang, 421002, China;[Yang, Zhenjun] College of Physics and Information Engineering, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang, 050024, China. zjyang@vip.163.com;[Li, Xingliang; Zhang, Shumin; Pang, Zhaoguang] College of Physics and Information Engineering, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang, 050024, China
通讯机构：
[Yang, Zhenjun] College of Physics and Information Engineering, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang, 050024, 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.
作者机构：
[Zhang, Shumin; Pang, Zhaoguang; Yang, Zhenjun] College of Physics and Information Engineering, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang, China;[Dai, Zhiping] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, China
通讯机构：
[Yang, Zhenjun] Hebei Normal Univ, Hebei Adv Thin Films Lab, Coll Phys & Informat Engn, Shijiazhuang 050024, Peoples R China.
作者机构：
[Dhanabalan, Sathish Chander; Zhang, Han; Sophia, Joice; Xiang, Yuanjiang; Xu, Changwen; Wang, Zhiteng] Shenzhen Key Laboratory of Two-Dimensional Materials and Devices, Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, Shenzhen University, Shenzhen, 518060, China;[Xu, Yanhua; Zhao, Chujun] Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha, 410082, China;[Li, Jianqing] Faculty of Information Technology, Macau University of Science and Technology, Avenida Wai Long, Taipa, China;[Wang, Zhiteng] Department of Physics and Electronic Information, Hengyang Normal University, Hengyang, 421008, China
期刊：
Journal of Physics B: Atomic, Molecular and Optical Physics,2011年44(3) ISSN：0953-4075
通讯作者：
Wang, XW
作者机构：
[Zhang, Deng-Yu; Xie, Li-Jun; Tang, Shi-Qing; Wang, Xin-Wen] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China
通讯机构：
[Wang, Xin-Wen] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词：
Bell-state measurements - Belong to - Entangled state - Nonlocal operation - Quantum state
期刊：
Quantum Information Processing,2013年12(2):1065-1075 ISSN：1570-0755
通讯作者：
Wang, XW
作者机构：
[Zhang, Deng-Yu; Xie, Li-Jun; Tang, Shi-Qing; Wang, Xin-Wen] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;[Wang, Xin-Wen] Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics, Hunan Normal University, Changsha 410081, China
作者机构：
[Wang, Youwen] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;[Hu, Yonghua; Wang, Youwen; Wen, Shuangchun; Zhang, Lifu; Fan, Dianyuan] School of Computer and Communication, Hunan University, Changsha 410082, China
作者机构：
[Lu, W.; Hu, Y.M.] Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, Hong Kong;[Gu, H.S.; Hu, Y.M.] State Key Lab of Ferro and Piezoelectric Materials and Devices of Hubei Province, Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, China;[Deng, X.H.] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, 421008, China
通讯机构：
[Deng, X. H.] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词：
Acoustic velocities - Applied pressures - Elastic properties - Equation of state - First-principles investigations - First-principles methods - Hexagonal osmium - High pressures - Mechanical anisotropies - Zero pressures
作者机构：
[Lau, Woon-Ming; Tang, Zhen-Kun; Zhang, Yan-Ning; Liu, Li-Min] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.;[Lau, Woon-Ming; Zhang, Yan-Ning] Chengdu Green Energy & Green Mfg Technol R&D Ctr, Chengdu 610207, Sichuan, Peoples R China.;[Zhang, Deng-Yu; Tang, Zhen-Kun] Hengyang Normal Univ, Dept Phys, Hengyang 421008, Peoples R China.;[Zhang, Deng-Yu; Tang, Zhen-Kun] Hengyang Normal Univ, Dept Elect, Hengyang 421008, Peoples R China.
通讯机构：
[Liu, Li-Min] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
摘要：
Three-dimensional (3D) hybrid layered materials receive a lot of attention because of their outstanding intrinsic properties and wide applications. In this work, the stability and electronic structure of three-dimensional graphene-MoS2 (3 DGM) hybrid structures are examined based on first-principle calculations. The results reveal that the 3 DGMs can easily self-assembled by graphene nanosheet and zigzag MoS2 nanoribbons, and they are thermodynamically stable at room temperature. Interestingly, the electronic structures of 3 DGM are greatly related to the configuration of joint zone. The 3 DGM with odd-layer thickness MoS2 nanoribbon is semiconductor with a small band gap of 0.01-0.25 eV, while the one with even-layer thickness MoS2 nanoribbon exhibits metallic feature. More importantly, the 3 DGM with zigzag MoS2 nanoribbon not only own the large surface area and effectively avoid the aggregation between the different nanoribbons, but also can remarkably enhance Li adsorption interaction, thus the 3 DGM have the great potential as high performance lithium ion battery cathodes.
