Control of dual-channel optical bistability in a carbon nanotube nanoresonator coupled with a metallic nanoshell
作者：
Long, Lin-Wen;Zhao, Wen-Hua;Peng, Yu-Xiang;Jiang, Yang-Yang;Wang, Xin-Jun;...
期刊：
Optics Express ,2024年32(17):30909-30918 ISSN：1094-4087
通讯作者：
Li, JB
作者机构：
[Peng, Yu-Xiang; Long, Lin-Wen; Li, Jian-Bo; Wang, Xin-Jun] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.;[Peng, Yu-Xiang; Li, Jian-Bo; Zhao, Wen-Hua; Jiang, Yang-Yang] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
通讯机构：
[Li, JB ] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
关键词：
Metal nanoparticles;Nonlinear absorption;Nonlinear effects;Optical properties;Quantum communications;Rayleigh scattering
摘要：
We theoretically present a flexible method to obtain dual-channel optical bistability (OB) in a coupled system consisting of a metallic nanoshell (MNS) and a carbon nanotube (CNT) nanomechanical resonator (NR) beyond the dipole approximation. The MNS is made of a metallic core and a dielectric shell. The results show that, the four-wave mixing signal is suppressed significantly due to multipole polarizations in comparison to that in the dipole approximation. Also, the four-wave mixing signal can be enhanced greatly with the exciton-phonon coupling strength g increasing. Especially, bistability phase diagrams plotted show that, for a given shell thickness, it is realizable to achieve one (or two) bistable region(s) by adjusting the pumping intensity (or the MNS-NR distance). In a strong exciton-plasmon coupling regime, OB can be switched from single-channel to dual-channel by only changing the dielectric shell thickness or the metallic core radius. This indicates that the system proposed can behave as a channel-tunable bistable switch. Our findings may have potential applications in various domains such as quantum communication and optical functional devices.
语种：
英文
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High Bipolar Conductivity and Robust In-Plane Spontaneous Electric Polarization in Selenene
作者：
Wang, Dan;Tang, Li-Ming* ;Jiang, Xing-Xing;Tan, Jie-Yao;He, Meng-Dong;...
期刊：
Advanced Electronic Materials ,2019年5(2):1800475- ISSN：2199-160X
通讯作者：
Tang, Li-Ming
作者机构：
[Wang, Dan; Wang, Xin-Jun; He, Meng-Dong] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Hunan, Peoples R China.;[Tan, Jie-Yao; Jiang, Xing-Xing; Tang, Li-Ming; Chen, Ke-Qiu] Hunan Univ, Sch Phys & Elect, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Tang, Li-Ming] H;Hunan Univ, Sch Phys & Elect, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
关键词：
atomic thickness ferroelectricity;selenene;2D elemental ferroelectricity
摘要：
Selenene has been predicted as a new member of an atomically thin 2D crystalline material family as of last year. With first principle calculations, two different stable phases of selenene, one with the 1T-MoS2-like structure (α-Se) and the other with alternating arrangement structure of deformed four-membered and six-membered rings (b-Se) are identified. Further research indicates that monolayer α-Se exhibits excellent bipolar conductivity, possessing rather high hole mobility close to that of graphene, and monolayer b-Se shows a robust in-plane spontaneous electric polarization of 13.46 mC cm−2 and a polarization reversing barrier of 422 meV per unit cell. The findings offer a promising material for high speed electronic devices and broaden the family of 2D ferroelectric materials, especially the family of elemental ferroelectric materials. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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Thermal conductance in graphene nanoribbons modulated by defects and alternating boron-nitride structures
作者：
Peng, Xiao-Fang* ;Zhou, Xin;Tan, Shi-Hua;Wang, Xin-Jun;Chen, Li-Qun;...
期刊：
Carbon ,2017年113:334-339 ISSN：0008-6223
通讯作者：
Peng, Xiao-Fang;Chen, Ke-Qiu
作者机构：
[Tan, Shi-Hua; Peng, Xiao-Fang; Wang, Xin-Jun; Zhou, Xin; Chen, Li-Qun] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Chen, Ke-Qiu] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Peng, Xiao-Fang] C;[Chen, Ke-Qiu] H;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
摘要：
The thermal transport properties of phonons in zigzag graphene nanoribbon (ZGNR) modulated by defect and alternating boron-nitride structure (BNS) are studied by nonequilibrium Greens function (NEGF) formalism combined with first-principles calculations of density-functional theory with local density approximation. Our calculations show that the thermal conductance in ZGNR with BNS is higher than that in ZGNR with cavity. The grouping between defect and BNS can induce high frequency phonon blocking effect, and the blocking effect depends on the structure parameter of defect and BNS. The grouping can modulate the transmission rate of phonons and thermal conductance on a large scale. A brief analysis of these results is given. © 2016 Elsevier Ltd
语种：
英文
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Half-metallicity and high spin-filtering effect of magnetic atoms embedded zigzag 6, 6, 12-graphyne nanoribbon
作者：
Zhao, Chen-Chen;Tan, Shi-Hua;Zhou, Yan-Hong;Wang, Rong-Ji;Wang, Xin-Jun* ;...
期刊：
Carbon ,2017年113:170-175 ISSN：0008-6223
通讯作者：
Wang, Xin-Jun;Chen, Ke-Qiu
作者机构：
[Zhao, Chen-Chen; Tan, Shi-Hua; Wang, Rong-Ji; Wang, Xin-Jun] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Tan, Shi-Hua; Zhou, Yan-Hong; Chen, Ke-Qiu] Hunan Univ, Dept Appl Phys, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Wang, Xin-Jun] C;[Chen, Ke-Qiu] H;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;Hunan Univ, Dept Appl Phys, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.
摘要：
We investigate the effects of embedded magnetic atoms on the edge states and spin-dependent transport properties of zigzag 6, 6, 12-graphyne nanoribbon (6, 6, 12-Z GYNRs) using non-equilibrium Greens functions combined with density-function theory. The results show that spin splitting occurs when doping magnetic atoms in the natural “holes” of the 6, 6, 12-Z GYNRs. Particularly, the half-metallicity can be achievable by the magnetic doping of the Co atom, which originates from the reversion of magnetic moment of edge carbon atoms induced by the coupling between the edge and the impurity states. Furthermore, in such doped nanoribbons, a high spin-filtering effect in rather wide bias range is found, opening a huge possibility in spintronics device applications. © 2016 Elsevier Ltd
语种：
英文
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Spin filter type transformation in Sn-phthalocyanine
作者：
Zhao, Chen-Chen;Tan, Shi-Hua* ;Peng, Xiao-Fang;Wang, Xin-Jun* ;Long, Mengqiu
期刊：
Organic Electronics ,2017年43:47-54 ISSN：1566-1199
通讯作者：
Tan, Shi-Hua;Wang, Xin-Jun
作者机构：
[Zhao, Chen-Chen; Tan, Shi-Hua; Peng, Xiao-Fang; Wang, Xin-Jun; Tan, SH; Wang, XJ] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Long, Mengqiu] Cent S Univ, Sch Phys & Elect, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Tan, SH; Wang, XJ] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Bandpass filters;Electrodes;Electron properties;Electronic transport properties;Non-equilibrium Green's function;Parallel configuration;Perfect type transformation;Spin filters;Spin transport;Structural reorganization;Density functional theory
摘要：
We have investigated the electronic transport properties of Sn-phthalocyanine (SnPc) by using nonequilibrium Green's functions in combination with the density functional theory. The results show that, the spin-up/spin-down PDOS peak at 0.74 eV of SnPc will firstly move toward to the Fermi level and then be away from the Feimi level as the Sn atom is pulled out. A transform from spin-down filter to spin-up filter can be observed in parallel configuration due to spin flipping introduced by structural reorganization. While in anti-parallel configuration, the band structures of the two electrodes will play the dominant role in the electron properties of SnPc. The spin filter type conversion can be realized by pulling the Sn atom out of the SnPc or flipping the magnetic field of one electrode. © 2017 Elsevier B.V.
语种：
英文
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Plasmon Resonances in a Periodic Square Coaxial Hole Array in a Graphene Sheet
作者：
Wang, Kai-Jun;Peng, Yu-Xiang;Wang, Lei;He, Meng-Dong* ;Li, Ze-Jun;...
期刊：
Plasmonics ,2016年11(4):1129-1137 ISSN：1557-1955
通讯作者：
He, Meng-Dong
作者机构：
[Peng, Yu-Xiang; Li, Ze-Jun; Wang, Kai-Jun; Liu, Ling-Hong; Wang, Lei; Wang, Xin-Jun; He, Meng-Dong; Li, Jian-Bo] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.;[Liu, Jian-Qiang] Jiujiang Univ, Coll Sci, Jiujiang 332005, Peoples R China.;[Xu, Liang] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Chen, Xiaoshuang; Hu, Wei-Da] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China.
通讯机构：
[He, Meng-Dong] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.
关键词：
Plasmon resonances;Graphene;Square coaxial hole array;Electromagnetic coupling
摘要：
We present a computational study of the plasmon resonances in a periodic square coaxial hole array in a graphene sheet, which consists of a square hole array and a square strip array. According to charge oscillation picture, we find that a new plasmon mode, which locates on the edges of square hole along the polarization direction of incident light, emerges in our proposed structure. Two hybridized plasmon resonance modes (i.e., symmetric and asymmetric plasmon resonance modes) are formed due to two different manners of coupling between the new plasmon mode of square hole and the plasmon mode of square strip. The two plasmon resonance modes can be tuned over a wide wavelength range by a small change in the chemical potential of graphene. Furthermore, the two plasmon resonances can also be controlled by changing L
x
and L
y
(which are the strip offsets from the hole center perpendicular and parallel to the polarization direction of incident light, respectively), originating from the change in the strength of electromagnetic coupling between square hole and square strip. Our study gives an insight into the physical mechanism of plasmon resonances in square graphene coaxial hole array, and our findings will be useful for designing graphene-based plasmonic devices and metamaterials.
语种：
英文
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Tunable ballistic thermal conductance of electrons in strained graphene nanoribbons
作者：
Peng, Xiao-Fang* ;Chen, Ke-Qiu* ;Wang, Xin-Jun;Tan, Shi-Hua
期刊：
Carbon ,2016年100:36-41 ISSN：0008-6223
通讯作者：
Peng, Xiao-Fang;Chen, Ke-Qiu
作者机构：
[Tan, Shi-Hua; Peng, Xiao-Fang; Wang, Xin-Jun] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Peng, Xiao-Fang] Changsha Univ Sci & Technol, Hunan Prov Higher Educ Key Lab Modeling & Monitor, Changsha, Hunan, Peoples R China.;[Chen, Ke-Qiu] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Peng, Xiao-Fang] C;[Chen, Ke-Qiu] H;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
摘要：
The thermal transport properties of electrons in graphene nanoribbon (GNR) subjected to strain fields are studied by non-equilibrium Green's function approach. The results show that the stretching of the carbon-carbon bond in strained GNR can enhance the ballistic thermal conductance of electrons. The enhancement originates from that the change of C-C bond length can modulate the nearest-neighbour π-orbital overlap and reduce the threshold energies of electron transport modes. A brief analysis of these results is given. © 2016 Elsevier Ltd. All rights reserved.
语种：
英文
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Light transmission through a one-dimensional metallic grating covered by a reduced cytochrome c molecule layer
作者：
Wang, Kai-Jun;Peng, Yu-Xiang;Wang, Lei;Liu, Ling-Hong;Li, Ze-Jun;...
期刊：
International Journal of Modern Physics B ,2016年30(16):1650088 ISSN：0217-9792
通讯作者：
He, Meng-Dong
作者机构：
[Peng, Yu-Xiang; Li, Ze-Jun; Wang, Kai-Jun; Liu, Ling-Hong; Wang, Lei; Wang, Xin-Jun; He, Meng-Dong; Li, Jian-Bo] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Xu, Liang] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[He, Meng-Dong] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Surface plasmon polaritons;plasmon resonance energy transfer;metallic grating;reduced cytochrome c molecule
摘要：
We investigate the transmission characteristics of a one-dimensional metallic grating covered by a reduced cytochrome (Cyt) c molecule layer by using the finite-difference time-domain (FDTD) method. It is found that the introduction of reduced Cyt c molecule layer leads to a transmission dip due to the plasmon resonance energy transfer (PRET) from metallic grating to Cyt c molecules. The transmission dip depth can be controlled by the period of metallic grating, the width and length of slit, and the Cyt c molecule layer number, while the transmission dip wavelength is unchanged with these parameters. The findings expand our understanding of the PRET phenomenon and have potential applications in molecule identification and detection. © 2016 World Scientific Publishing Company.
语种：
英文
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多通道石墨纳米带中弹性声学声子输运和热导特性
作者：
Qing Qian-Jun;Zhou Xin;Xie Fang;Chen Li-Qun* ;Wang Xin-Jun;...
期刊：
物理学报 ,2016年65(8):086301-1-086301-13 ISSN：1000-3290
通讯作者：
Chen Li-Qun;Peng Xiao-Fang
作者机构：
[Qing Qian-Jun; Chen Li-Qun; Tan Shi-Hua; Peng Xiao-Fang; Zhou Xin; Wang Xin-Jun] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Peng Xiao-Fang] Changsha Univ Sci & Technol, Hunan Prov Higher Educ Key Lab Modeling & Monitor, Changsha 410004, Hunan, Peoples R China.;[Xie Fang] Yichun Univ, Sch Phys Sci & Engn Technol, Yichun 336000, Peoples R China.
通讯机构：
[Chen, LQ; Peng, XF; Peng Xiao-Fang] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;Changsha Univ Sci & Technol, Hunan Prov Higher Educ Key Lab Modeling & Monitor, Changsha 410004, Hunan, Peoples R China.
关键词：
非平衡格林函数;声学声子输运;热导;量子体系
摘要：
采用非平衡格林函数方法, 在保持总的能量输出通道中石墨链数不变的条件下, 研究并比较了并列的石墨纳米带通道中弹性声学声子输运和热导特性. 结果表明, 能量输出通道的增加能降低每个能量输出通道的热导; 与能量输入热库最近的能量输出通道热导最大, 最远的能量输出通道热导最小; 中间能量输出通道的热导性质与并列的各输出通道的结构参数密切相关, 最近和最远的能量输出通道的热导性质仅与各自能量输出通道的结构参数有关; 粗糙边缘结构能有效调节各通道的热导; 总的热导性质与能量输出通道石墨链数、能量输出通道数以及边缘结构粗糙程度密切相关.
语种：
中文
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Optical properties of a metallic nanoparticle array covered by a reduced cytochrome c molecule layer
作者：
Peng, Yu-Xiang;Wang, Kai-Jun;Zhang, Xin-Min;Wang, Ying;Li, Ze-Jun;...
期刊：
Optical and Quantum Electronics ,2016年48(12):1-11 ISSN：0306-8919
通讯作者：
He, Meng-Dong
作者机构：
[Zhang, Xin-Min; Peng, Yu-Xiang; Li, Ze-Jun; Luo, Jian-Hua; Wang, Kai-Jun; Liu, Ling-Hong; Wang, Ying; Wang, Xin-Jun; He, Meng-Dong; Li, Jian-Bo] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Liu, Jian-Qiang] Jiujiang Univ, Coll Sci, Jiujiang 332005, Peoples R China.
通讯机构：
[He, Meng-Dong] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Localized surface plasmon resonance;Plasmon resonance energy transfer;Metallic nanoparticle array;Reduced cytochrome c molecule
摘要：
We investigate the optical properties of a metallic nanoparticle array covered by a reduced cytochrome (Cyt) c molecule layer by using the finite-difference time-domain method. As the wavelength of the surface plasmon resonance of metallic nanoparticle array matches with that of the absorption peak of reduced Cyt c molecules, a pronounced spectral dip forms in extinction spectrum due to the plasmon resonance energy transfer from metallic nanoparticles to Cyt c molecules. The depth of extinction dip can be controlled by the length and width of metallic nanoparticle, the grating constant, and the Cyt c molecule layer number, though the position of extinction dip is unchanged with these parameters. The findings may find applications in molecule identification and detection. © 2016, Springer Science+Business Media New York.
语种：
英文
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应用物理专业本科生创新能力培养和科学研究有机融合的探索实践
作者：
罗勇锋;王新军;贺梦冬;彭小芳;罗建花;...
期刊：
电子制作 ,2015年(20):59 ISSN：1006-5059
作者机构：
中南林业科技大学理学院 湖南长沙 410004;[贺梦冬; 彭小芳; 陈丽群; 罗建花; 王新军; 罗勇锋] 中南林业科技大学
关键词：
应用物理;光电领域;高校工作者;物理理论;高素质人才培养;教学组织形式;学习难度;课堂教学;课程设置
摘要：
我校应用物理专业开办了光电子方向,本文以培养光电领域创新意识和创新能力为例,分析影响学生创新能力各种因素,提出在应用物理专业中构建创新能力培养和科学研究有机融合的创新教学体系。
语种：
中文
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浅谈生活物理与课堂教学的结合
作者：
李建波;贺梦冬;王新军
期刊：
学苑教育 ,2015年(10):65 ISSN：1674-179X
作者机构：
中南林业科技大学理学院;[贺梦冬; 王新军; 李建波] 中南林业科技大学
关键词：
生活物理;课堂教学;生活化
摘要：
物理教学与实际生活相结合,让学生在课堂中时刻联想到生活中的各种现象,思考其发生的原因,这样更能激发学生的学习兴趣以及强烈的求知欲,进而改变以往枯燥且单纯的物理知识讲述。物理课堂教学要回归生活,物理生活化。
语种：
中文
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A tunable bistable device based on a coupled quantum dot-metallic nanoparticle nanosystem
作者：
Li, Jian-Bo* ;Liang, Shan;He, Meng-Dong;Chen, Li-Qun;Wang, Xin-Jun;...
期刊：
APPLIED PHYSICS B-LASERS AND OPTICS ,2015年120(1):161-166 ISSN：0946-2171
通讯作者：
Li, Jian-Bo
作者机构：
[Peng, Xiao-Fang; Wang, Xin-Jun; He, Meng-Dong; Chen, Li-Qun; Li, Jian-Bo] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Liang, Shan] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Li, Jian-Bo] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Optical Bistability;Nonlinear Optical Response;Pump Field;Bistability Region;Plasmon Interaction
摘要：
We theoretically propose a scheme of a tunable bistable device based on a coupled semiconductor quantum dot–metal nanoparticle nanosystem in the simultaneous presence of a strong pump laser and a weak probe laser with different frequencies. The results show that it is easy to turn on or off the optical bistable effect in such system by switching the polarization direction of the pump field, and the bistability thresholds are highly sensitive to the intensity, frequency, polarization direction of the pump field, and the interparticle distance. In addition, the nonlinear absorption in the two stable states exhibits a ratio as high as 104 arising from the three-photon effect, which implies that our nanosystem can also be used as an optical memory cell. © 2015, Springer-Verlag Berlin Heidelberg.
语种：
英文
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Solving large-scale TSP using a fast wedging insertion partitioning approach
作者：
Xiang, Zuoyong;Chen, Zhenyu* ;Gao, Xingyu;Wang, Xinjun;Di, Fangchun;...
期刊：
Mathematical Problems in Engineering ,2015年2015:1-8 ISSN：1024-123X
通讯作者：
Chen, Zhenyu
作者机构：
[Wang, Xinjun; Xiang, Zuoyong] Cent S Univ Forestry & Technol, Sch Sci, Changsha 410004, Hunan, Peoples R China.;[Di, Fangchun; Chen, Zhenyu; Li, Lixin; Liu, Guangyi] China Elect Power Res Inst, Beijing 100192, Peoples R China.;[Gao, Xingyu] Chinese Acad Sci, Inst Comp Technol, Beijing 100190, Peoples R China.;[Zhang, Yi] State Grid Fujian Elect Power Res Inst, Fuzhou 350007, Fujian, Peoples R China.
通讯机构：
[Chen, Zhenyu] C;China Elect Power Res Inst, Beijing 100192, Peoples R China.
关键词：
Algorithms;Algorithm's performance;Insertion methods;Partitioning methods;Symmetric traveling salesman problems;Time complexity;Traditional constructions;Traveling salesman problem
摘要：
A new partitioning method, called Wedging Insertion, is proposed for solving large-scale symmetric Traveling Salesman Problem (TSP). The idea of our proposed algorithm is to cut a TSP tour into four segments by nodes' coordinate (not by rectangle, such as Strip, FRP, and Karp). Each node is located in one of their segments, which excludes four particular nodes, and each segment does not twist with other segments. After the partitioning process, this algorithm utilizes traditional construction method, that is, the insertion method, for each segment to improve the quality of tour, and then connects the starting node and the ending node of each segment to obtain the complete tour. In order to test the performance of our proposed algorithm, we conduct the experiments on various TSPLIB instances. The experimental results show that our proposed algorithm in this paper is more efficient for solving large-scale TSPs. Specifically, our approach is able to obviously reduce the time complexity for running the algorithm; meanwhile, it will lose only about 10% of the algorithm's performance. © 2015 Zuoyong Xiang et al.
语种：
英文
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Plasmon Resonances in a Stacked Pair of Periodic Graphene Hole Arrays
作者：
Wang, Kai-Jun;He, Meng-Dong* ;Ma, Wang-Guo;Wang, Lei;Li, Jian-Bo;...
期刊：
Plasmonics ,2015年10(6):1695-1702 ISSN：1557-1955
通讯作者：
He, Meng-Dong
作者机构：
[Ma, Wang-Guo; Wang, Kai-Jun; Wang, Lei; Wang, Xin-Jun; He, Meng-Dong; Li, Jian-Bo] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Chen, Xiaoshuang; Hu, Wei-Da] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China.;[Liu, Jian-Qiang] Jiujiang Univ, Coll Sci, Jiujiang 332005, Peoples R China.
通讯机构：
[He, Meng-Dong] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Plasmon resonances;Graphene;Hole array;Electromagnetic coupling
摘要：
In this paper, we investigate the plasmon resonances in a stacked pair of periodic graphene hole arrays by using charge oscillation picture. It is found that the plasmon resonances can be controlled by changing the longitudinal interval G between two arrays, and the lateral displacements L
x
and L
y
, which are parallel and perpendicular to the polarization direction of the incident light, respectively. The plasmon resonance can be tuned over a wide wavelength range by a small change of G due to its influence on the strength of electromagnetic coupling between two arrays. The lateral displacement L
x
causes new plasmon resonance modes, originating from the appearance of new electromagnetic coupling manners, while the lateral displacement L
y
leads to the splitting of plasmon resonance mode, which results from two different electromagnetic coupling manners. Our study gives an insight into the physical mechanism of plasmon resonances in two graphene hole arrays, and our findings may hold great promise in designing graphene-based plasmonic devices and metamaterials.
语种：
英文
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Controllable electromagnetic transmission based on metallic nanoslit with a microcavity
作者：
Wang, Xin-Jun* ;He, Meng-Dong;Ma, Wang-Guo;Liu, Jian-Qiang
期刊：
Optical and Quantum Electronics ,2014年46(11):1425-1433 ISSN：0306-8919
通讯作者：
Wang, Xin-Jun
作者机构：
[Ma, Wang-Guo; Wang, Xin-Jun; He, Meng-Dong] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Liu, Jian-Qiang] Jiujiang Univ, Coll Sci, Jiujiang 332005, Peoples R China.
通讯机构：
[Wang, Xin-Jun] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Electromagnetic transmission;Metallic nanoslit with microcavity;Surface plasmon polaritons
摘要：
In this paper, we explore the electromagnetic transmission through a vertical metallic nanoslit with a horizontal microcavity. The introduction of microcavity gives rise to the changes of slit transmission spectrum in the number and amplitude of transmission peak and dip, owing to the electromagnetic coupling between slit and microcavity. The transmission through the slit with microcavity strongly depends on whether the isolated slit is in resonance or not, and the microcavity resonance is an additional factor that influences the transmission. The transmission spectrum can be adjusted by changing the opening position of slit, and the slit depth, the width and depth of microcavity. Our results are analysed and discussed from the view of Fano resonance. These results may be of value in tuning electromagnetic wave in subwavelength optics and designing plasmonic devices based on composite metallic nanoslit structures. © 2013, Springer Science+Business Media New York.
语种：
英文
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大学物理实验管理创新研究与实践
作者：
王新军;李水;贺梦冬;王凯军
期刊：
中南林业科技大学学报(社会科学版) ,2014年8(1):172-174 ISSN：1673-9272
作者机构：
中南林业科技大学理学院,湖南长沙,410004
关键词：
大学物理实验;管理;创新
摘要：
提高大学物理实验课教学质量,是高等学校本科教学质量与教学改革工程中的重要课题。为使大学物理实验整个教学过程有序、规范、可控,促进大学物理实验课教学质量的有效提高,中南林业科技大学物理实验室以实验管理为突破口,开展了一系列的创新研究和实践,取得了较好的效果。实践证明,只有完善了大学物理实验管理,其它改革措施才能真正落到实处。
语种：
中文
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Low-temperature thermal conductance in three-dimensional nanowire embedded with phonon cavity
作者：
Wang, Xin-Jun* ;Peng, Xiao-Fang;He, Meng-Dong
期刊：
Modern Physics Letters B ,2014年28(24):1450193 ISSN：0217-9849
通讯作者：
Wang, Xin-Jun
作者机构：
[Peng, Xiao-Fang; Wang, Xin-Jun; He, Meng-Dong] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wang, Xin-Jun] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Low-temperature thermal conductance;nanowire;phonon-cavity
摘要：
In this paper, we investigate low-temperature thermal conductance in three-dimensional nanowire embedded with phonon cavity based on the full scalar model of elasticity. The results show that at very low temperatures, the cavity can enhance the thermal conductance in certain lateral-width range, just as the constructive coupling of more phonon-modes excited in the cavity with modes in the transport region. At higher temperatures, however, the scattering of more interfaces formed from the cavity become a dominant factor to suppress the phonon transmission. Moreover, it is found that while the material in the cavity is substituted for the material with higher sound velocity than that in the transport region, the thermal conductance is also enhanced. © 2014 World Scientific Publishing Company.
语种：
英文
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Thermal conductance associated with six types of vibration modes in quantum wire modulated with quantum dot
作者：
Peng, Xiao-Fang* ;Wang, Xin-Jun;Chen, Li-Qun;Li, Jian-Bo;Zhou, Wu-Xing;...
期刊：
Physics Letters A ,2014年378(30-31):2195-2200 ISSN：0375-9601
通讯作者：
Peng, Xiao-Fang
作者机构：
[Zhang, Gui; Peng, Xiao-Fang; Wang, Xin-Jun; Chen, Li-Qun; Li, Jian-Bo] Ctr South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.;[Zhou, Wu-Xing; Peng, Xiao-Fang; Wang, Xin-Jun; Chen, Ke-Qiu] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Peng, Xiao-Fang] C;Ctr South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.
关键词：
Ballistic phonon transport;Thermal conductance;Quantum structure
摘要：
We study the ballistic phonon transport and thermal conductance of six low-lying vibration modes in quantum wire modulated with quantum dot at low temperatures. A comparative analysis is made among the six vibrational modes. The results show that the transmission rates of the six vibrational modes relative to reduced frequency display periodic or quasi-periodic oscillatory behavior. Among the four acoustic modes, the thermal conductance contributed by the torsional mode is the smallest, and the thermal conductances of other acoustic modes have adjacent values. It is also found that the thermal conductance of the optical mode increases from zero monotonously. Moreover, the total thermal conductance in concavity-shaped quantum structure is lower than that in convexity-shaped quantum structure. These thermal conductance values can be adjusted by changing the structural parameters of the quantum dot. (C) 2014 Elsevier B.V. All rights reserved.
语种：
英文
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Plasmon resonances in a stacked pair of graphene ribbon arrays with a lateral displacement
作者：
He, Meng-Dong* ;Zhang, Gui;Liu, Jian-Qiang;Li, Jian-Bo;Wang, Xin-Jun;...
期刊：
Optics Express ,2014年22(6):6680-6690 ISSN：1094-4087
通讯作者：
He, Meng-Dong
作者机构：
[Zhang, Gui; Wang, Xin-Jun; He, Meng-Dong; Li, Jian-Bo] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.;[Liu, Jian-Qiang] Jiujiang Univ, Coll Sci, Jiujiang 332005, Peoples R China.;[Huang, Zhen-Rong; Wang, Lingling] Hunan Univ, Key Lab Micronano Optoelect Devices, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Chen, Xiaoshuang] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China.
通讯机构：
[He, Meng-Dong] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Electromagnetism;Graphene;Plasmons;Resonance;Array structures;Electromagnetic interactions;Electromagnetic resonance;Graphene ribbons;Lateral displacements;Plasmon resonances;Plasmon waveguide;Surface plasmon modes;Waveguides
摘要：
We find that a stacked pair of graphene ribbon arrays with a lateral displacement can excite plasmon waveguide mode in the gap between ribbons, as well as surface plasmon mode on graphene ribbon surface. When the resonance wavelengthes of plasmon waveguide mode and surface plasmon mode are close to each other, there is a strong electromagnetic interaction between the two modes, and then they contribute together to transmission dip. The plasmon waveguide mode resonance can be manipulated by the lateral displacement and longitudinal interval between arrays due to their influence on the manner and strength of electromagnetic coupling between two arrays. The findings expand our understanding of electromagnetic resonances in graphene-ribbon array structure and may affect further engineering of nanoplasmonic devices and metamaterials. © 2014 Optical Society of America.
语种：
英文
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