作者机构：
[ Ling, Xiaohui ; Hussain, Sajid ; Danner, Aaron ; Zhang, Tianhang ; Zhang, Lei ; Siew, S.Y. ; Mehmood, M.Q. ; Mei, Shengtao ; Qiu, Cheng-Wei ] Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, Singapore;[ Teng, Jinghua ; Huang, Kun ; Liu, Hong ] Institute of Materials Research, Engineering Agency for Science Technology and Research (ASTAR) Innovis, #08-03 2 Fusionopolis Way, Singapore, Singapore;[ Mei, Shengtao ; Qiu, Cheng-Wei ] Graduate School for Integrative Sciences and Engineering, National University of Singapore, Centre for Life Sciences (CeLS), #05-01, 28 Medical Drive, Singapore, Singapore;[ Zhang, Shuang ] School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom;[ Ling, Xiaohui ] College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang, China
通讯机构：
[Qiu, CW] Natl Univ Singapore, Ctr Life Sci CeLS, Grad Sch Integrat Sci & Engn, 05-01,28 Med Dr, Singapore 117456, Singapore.;Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore.
关键词：
Geometric phase - Momentum-dependent - Orbital angular momentum of light - Pancharatnam-Berry phase - Reflection and refractions - Spin orbit interactions - Unified description - Visible wavelengths
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：
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：
[Wang, Xin-Wen; Zhang, Deng-Yu] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, 421008, China;[Wang, Xin-Wen] Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing, 100875, China;[Wang, Zhi-Yong] National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China;[Xia, Li-Xin] Department of Physics, Henan University of Science and Technology, Luoyang, 471003, China
通讯机构：
[Wang, XW] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词：
Multipartite entanglement;Quantum-information splitting;Asymmetric distribution
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：
[Chen, Ke-Qiu] Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha, China;[Zeng, Jing] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, China
通讯机构：
[Zeng, J] 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
通讯机构：
[Qiu, CW] Natl Univ Singapore, NUS Grad Sch Integrat Sci & Engn, Singapore 117456, Singapore.;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：
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.
作者机构：
[Ling, Xiaohui ] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, China;[ Yi, Xunong ; Ling, Xiaohui ; Luo, Hailu ] SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China;[Ling, Xiaohui ; Shu, Weixing ; Luo, Hailu ; Wen, Shuangchun ; Liu, Yachao ; Zhou, Xinxing ] Laboratory for Spin Photonics, College of Physics and Microelectronic Science, Hunan University, Changsha, 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：
[Zhan, Xiao-Gui] Department of Physics and Electronic Information Science, Research Institute of Photoelectricity, Hengyang Normal University, Hengyang 421008, China;[Si, Liu-Gang; Zhan, Xiao-Gui; Yang, Xiaoxue] 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
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：
Quantum Information Processing,2013年12(2):1065-1075 ISSN：1570-0755
通讯作者：
Wang, XW
作者机构：
[Wang, Xin-Wen; Tang, Shi-Qing; Xie, Li-Jun; Zhang, Deng-Yu] 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
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：
[Wang, Xin-Wen; Tang, Shi-Qing; Xie, Li-Jun; Zhang, Deng-Yu] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China
通讯机构：
[Wang, XW] 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
作者机构：
[Deng, X.H. ] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang, 421008, China;[ Hu, Y.M. ; Lu, W. ] Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, Hong Kong;[ Hu, Y.M. ; Gu, H.S. ] State Key Lab of Ferro and Piezoelectric Materials and Devices of Hubei Province, Faculty of Physics and Electronic Technology, Hubei University, Wuhan, 430062, China
通讯机构：
[Deng, XH] 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：
[Fan, Dianyuan; Zhang, Lifu; Wen, Shuangchun; Wang, Youwen; Hu, Yonghua] School of Computer and Communication, Hunan University, Changsha 410082, China;[Wang, Youwen] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China
作者机构：
[ Yang, Zhenjun ; Pang, Zhaoguang ; Zhang, Shumin ] 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, ZJ] Hebei Normal Univ, Hebei Adv Thin Films Lab, Coll Phys & Informat Engn, Shijiazhuang 050024, Peoples R China.
关键词：
Analytical expressions - Graded refractive indices - Intensity distribution - Nonlinear medium - Nonlocal nonlinear media - Optical fractional fourier transforms - Propagation properties - Vortex beams
期刊：
Physical Review A - Atomic, Molecular, and Optical Physics,2011年84(4) ISSN：1050-2947
通讯作者：
Wang, XW
作者机构：
[Wang, Xin-Wen; Tang, Shi-Qing; Xie, Li-Jun; Zhang, Deng-Yu] Department of Physics and Electronic Information, Hengyang Normal University, Hengyang 421008, China;[Yang, Guo-Jian] Department of Physics, Beijing Normal University, Beijing 100875, China
通讯机构：
[Wang, XW] Hengyang Normal Univ, Dept Phys & Elect Informat, Hengyang 421008, Peoples R China.
关键词：
Bound entangled state - Common features - Entangled state - Global operations - Local operations and classical communications - Multi-level systems - Multipartite entanglements - Quantum Information
期刊：
Physica E: Low-Dimensional Systems and Nanostructures,2011年44(2):495-500 ISSN：1386-9477
通讯作者：
Deng, X.(xiaohuideng@126.com)
作者机构：
[ Si, Mingsu ] Key Laboratory of Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China;[ Zhang, Dengyu ; Deng, Xiaohui ] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;[ Deng, Mingsen ] Guizhou Key Laboratory of Economic System Simulation, Guizhou College of Finance and Economics, Guiyang 550004, China;[ Deng, Mingsen ] Institute of Applied Physics, Guizhou Normal College, Guiyang 550018, China
通讯机构：
[Deng, XH] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词：
Ab initio - Adsorption ability - Adsorption behavior - Adsorption properties - C-doped - Carbon doping - Defect type - Density functional theory calculations - Efficient method - Gas molecules - Gas sensing - Physisorbed
摘要：
This paper investigates the thermal pairwise entanglement of a three-qubit Heisenberg XXZ chain in the presence of the Dzyaloshinski-Moriya (DM) anisotropic antisymmetric interaction and quantum teleportation when using the Heisenberg chain as a channel.The entanglement dependences on the DM interaction and temperature are given in detail.It obtains the relation between the concurrence and average fidelity,and shows that the same concurrence can lead different average fidelities.Moreover,it finds the thermally entangled states which do not violate the Bell inequalities,and can still be used for quantum teleportation.
期刊：
IEEE Transactions on Nuclear Science,2011年58(1):209-213 ISSN：0018-9499
通讯作者：
Tan, Y.(hytyl@163.com)
作者机构：
[Tan, Yanliang ; Xiao, Detao ] School of Nuclear Science and Technology, University of South China, Hunan Province 421001, China;[Tan, Yanliang ] Department of Physics and Electronics, Hengyang Normal University, Hunan Province 421001, China
通讯机构：
[Tan, YL] Univ S China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
