Effect of local toroidal flow on double-tearing modes in cylindrical geometry
作者：
Zhang, Ruibo;Lu, Xingqiang* ;Guo, Wei;Yin, Chenyan;Gong, Xueyu
期刊：
CONTRIBUTIONS TO PLASMA PHYSICS ,2020年60(9):e202000026- ISSN：0863-1042
通讯作者：
Lu, Xingqiang
作者机构：
[Lu, Xingqiang; Yin, Chenyan; Zhang, Ruibo; Gong, Xueyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zhang, Ruibo] Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China.;[Guo, Wei] Univ South China, Sch Elect Engn, Hengyang, Peoples R China.
通讯机构：
[Lu, Xingqiang] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
double-tearing modes;local toroidal plasma flows;MHD
摘要：
The effect of local toroidal flow (LTF) on double-tearing modes (DTMs) is investigated in cylindrical geometry using the reduced magnetohydrodynamics (RMHD) model. The results indicate that the LTF between the two rational surfaces is the dominant suppression effect on DTMs. The suppression effect is enhanced with the flow width increasing, and the DTMs become more stable with the increase of the shear of the LTF between the two rational surfaces. So, in the reversed shear magnetic field configuration, the local flow is driven between the two rational surfaces, which can effectively suppress the development of DTMs and maintain the high-performance state.
语种：
英文
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A distinct excited-state proton transfer mechanism for 4-(N-Substituted-amino)-1H-pyrrolo[2,3-b]pyridines in aprotic and protic solvents
作者：
Li, Changming;Tang, Zhe;Zhou, Panwang;Guo, Wei*
期刊：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY ,2020年231:117800 ISSN：1386-1425
通讯作者：
Guo, Wei
作者机构：
[Guo, Wei; Li, Changming] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Zhou, Panwang; Li, Changming; Tang, Zhe] Shandong Univ, Inst Mol Sci & Engn, Qingdao 266235, Peoples R China.;[Zhou, Panwang] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.
通讯机构：
[Guo, Wei] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Concerted mechanism;Excited state proton transfer;Potential energy surface;Stepwise mechanism;TDDFT
摘要：
Time-dependent density functional theory (TDDFT) method was used to study the different excited states proton transfer mechanism of DPP in cyclohexane (CHE) and Methanol (MeOH). The results indicate that the concerted mechanism and the stepwise mechanism coexist in the double proton transfer process of DPP dimer in the aprotic solvent CHE, the stepwise mechanism predominates. The stepwise mechanism can only carry out single proton transfer (DPP-SPT), the second proton cannot be transferred because it is hindered by high energy barriers. The concerted mechanism produces a double proton transfer (DPP-DPT). The potential energy surface of the DPP dimer was calculated and the double fluorescence phenomenon of DPP dimer observed by Chou et al. (P.T. Chou, Y.I. Liu, H.W. Liu, W.S. Yu, Dual Excitation behavior of double proton transfer versus Charge Transfer in 4-(N-Substituted Amino)-1H-pyrrolo[2,3-b]pyridines tuned by dielectric and hydrogen-bonding perturbation, J. Am. Chem. Soc., 123 (2001) 12119-12120) was explained. In view of the protonic solvent effect of methanol, the potential energy curve of the DPP/MeOH cluster was constructed. The fluorescence quenching process of DPP/MeOH clusters was elucidated. The proton transfer pathways of DPP/MeOH clusters are revealed in two different concerted ways (Type A: protons transfer from DPP molecules to MeOH solvent molecules; Type B: protons transfer from MeOH solvent to DPP molecules). The ESPT process of DPP molecules in the protic solvent MeOH was found to be more prone to Type B. The results can help to better understand the intermolecular hydrogen bonding mechanism of DPP molecules. © 2019 Elsevier B.V.
语种：
英文
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Enhanced Optical Transmission Assisted Near-Infrared Plasmonic Optical Filter via Hybrid Subwavelength Structures
作者：
Wen, Kui;Luo, Xiao-Qing* ;Chen, Zhiyong;Zhu, Weihua;Guo, Wei;...
期刊：
Plasmonics ,2019年14(6):1649-1657 ISSN：1557-1955
通讯作者：
Luo, Xiao-Qing;Wang, Xinlin
作者机构：
[Luo, Xiao-Qing; Zhu, Weihua; Luo, XQ; Wang, XL; Guo, Wei; Wang, Xinlin; Wen, Kui; Chen, Zhiyong] Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultra Fast Micro Nano Technol, Hengyang 421001, Peoples R China.;[Wang, Xinlin] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Luo, XQ; Wang, XL; Wang, Xinlin] U;Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultra Fast Micro Nano Technol, Hengyang 421001, Peoples R China.;Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
关键词：
Plasmonic optical filter;Enhanced optical transmission;Interaction between light and metallic film
摘要：
Enhanced optical transmission (EOT), which results from the incident light interacting with the subwavelength nanostructures patterned in a metallic film, showcases the excitation of surface plasmon modes on both surfaces of the metallic film and their intercoupling effects. Here, we numerically study the EOT phenomenon from the incident light acting on the periodic subwavelength hybrid arrays in a metallic film, which contains annular concentric core and aperture unit structure undergoing multiple geometrical configurations. It is shown that several configurations, which consist of a core with a different number of apertures, of the unit structure, are possible to facilitate the intercoupling between the surface plasmon polariton resonance mode of the core and the localized surface plasmon resonance mode of the aperture. Moreover, taking advantage of the EOT effect realized in the periodic structure arrays including a concentric core with triple-aperture unit structure, we propose a plasmonic optical filter (POF) in the near-infrared region. By adjusting both the periods and the width difference between the nearest-neighbor two apertures of the unit structure, the realization of near-infrared POF accompanies with tunable positions and amplitudes of the EOT peaks. Additionally, these behaviors could also be extended to the case of a concentric core with a multiple-aperture unit structure for actualizing near- or mid-infrared POF effect. Our results promise new avenues for plasmonic devices and enrich the application range of metallic structures in the field of optical communications and information processing. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
语种：
英文
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The effects of the heteroatom and position on excited-state intramolecular proton transfer of new hydroxyphenyl benzoxazole derivatives: a time-dependent density functional theory study
作者：
Li, Changming;Guo, Wei* ;Zhou, Panwang;Tang, Zhe
期刊：
Organic Chemistry Frontiers ,2019年6(11):1807-1815 ISSN：2052-4110
通讯作者：
Guo, Wei
作者机构：
[Guo, Wei; Li, Changming] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Li, Changming] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.;[Zhou, Panwang; Tang, Zhe] Shandong Univ, Inst Mol Sci & Engn, Qingdao 266235, Shandong, Peoples R China.
通讯机构：
[Guo, Wei] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Atoms;Excited states;Potential energy;Proton transfer;Atom substitution;Benzoxazole derivatives;Excited-state intramolecular proton transfer;Heteroatom substitution;Infrared spectrum;Position effect;Potential energy curves;Time dependent density functional theory;Density functional theory
摘要：
The effects of the heteroatom and position on excited-state intramolecular proton transfer (ESIPT) of 2-[4′-(N-4,6-dichloro-1,3,5-triazi-n-2-yl)2′hydroxyphenyl]benzoxazole (4THBO) have been investigated via time-dependent density functional theory studies. The heteroatoms refer to O and S atoms, and the position effect refers to the N-4,6-trichloro-1,3,5-triazin-2-yl (TCT) substituents in the para and meta positions. The configuration of the four compounds (4THBO, 4THBT, 5THBO and 5THBT) was optimized and the bond lengths, bond angles and infrared spectra of the atoms participating in the proton transfer in the S0 and S1 states were studied. The occurrence of ultrafast ESIPT in the four compounds was demonstrated. Moreover, the potential energy curves of the S0 and S1 states were constructed, and the effects of the heteroatom substitution and substituent position changes on the ESIPT mechanism of the four 4THBO derivatives were analyzed. The results show that the ESIPT barrier of the S atom substitution in the excited state is lower than that of the O atom-substituted molecule, and the energy barrier of the substituent (TCT) in the meta-position is significantly smaller than that in the para-position. These results indicate that the substitution of the S heteroatom promotes the ESIPT of the 4THBO compound and that the substituent (TCT) in the para position is more prone to proton transfer than that in the meta position. Our work could provide a theoretical basis for further experiments. © 2019 the Partner Organisations.
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英文
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Fragmentation of H_2 in 405 nm intense femtosecond laser field
作者：
郭玮;常志强;李月华
期刊：
量子电子学报 ,2018年35(2):129-135 ISSN：1007-5461
作者机构：
School of Electrical Engineering,University of South China, Hengyang, 421001;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, State Key Laboratory of Molecular Reaction Dynamics, Dalian, 116023;[郭玮] School of Electrical Engineering,University of South China, Hengyang, 421001 Dalian Institute of Chemical Physics, Chinese Academy of Sciences, State Key Laboratory of Molecular Reaction Dynamics, Dalian, 116023;[常志强; 李月华] School of Electrical Engineering,University of South China, Hengyang, 421001
关键词：
光谱学;反应路径;速度映像成像;光缀饰态
摘要：
使用速度成像法测得了405 nm飞秒激光脉冲下H~+的动能分布和角分布。讨论了解离通道H_2~+ → H~+ + H、H_2~(2+) → H~+ + H~+的反应路径,前者产生于经由1_2ω交叉的直接单光子路径,后者产生于H_2~(2+)的库仑爆炸。H_2~+到H_2~(2+)的电离起始于键软化,各通道的相对峰高说明H_2~+的解离和电离是竞争的。低场强加强H_2~+的解离,高场强支持H_2~+的电离。
语种：
中文
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A Compact Optical Switch via Plasmonics of Subwavelength Circular-Sharp Hole Arrays in Metal Films
作者：
Sun, Taiming;Deng, Zhixiang* ;Sheng, Jiabing;Chen, Zhiyong;Zhu, Weihua;...
期刊：
Annalen der Physik ,2018年530(3):1700299- ISSN：0003-3804
通讯作者：
Deng, Zhixiang;Wang, Xinlin
作者机构：
[Sun, Taiming; Deng, Zhixiang; Zhu, Weihua; Guo, Wei; Wang, Xinlin; Deng, ZX; Wang, XL; Sheng, Jiabing; Chen, Zhiyong] Univ South China, Sch Elect Engn, Changsha 421001, Hunan, Peoples R China.;[Wang, Xinlin] Univ South China, Sch Mech Engn, Changsha 421001, Hunan, Peoples R China.
通讯机构：
[Deng, ZX; Wang, XL; Wang, Xinlin] U;Univ South China, Sch Elect Engn, Changsha 421001, Hunan, Peoples R China.;Univ South China, Sch Mech Engn, Changsha 421001, Hunan, Peoples R China.
关键词：
circular-sharp hole arrays;enhanced optical transmission;finite-difference time-domain;plasmonic switch;surface plasmons
摘要：
We studied numerically the enhanced optical transmission (EOT) through periodic subwavelength circular-sharp hole arrays in metallic films with different edge sharp distribution features of unit structures. Detailed studies indicate that the unit structure edge sharp distribution features strongly influence the surface plasmons (SPs). These results demonstrate that the number of edge sharp activated the localized surface plamons (LSP) resonance on the unit structure is changed by rotating the polarization of the incident light, leading to change the infrared transmittance of the array. Moreover, a compact plasmonic switch via periodic circular-sharp hole arrays based on the dependence of SPs on unit structural edge sharp distributions is proposed. The finding provides a new idea for designing plasmonics devices, and expands the application range of metal micro-nano structure in the field of optical communications and information processing. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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Femtosecond photoelectron imaging of NO at 410 nm
作者：
Guo, Wei;Wang, Yi;Li, Yuehua*
期刊：
Optik ,2018年161:151-155 ISSN：0030-4026
通讯作者：
Li, Yuehua
作者机构：
[Wang, Yi; Guo, Wei; Li, Yuehua] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Guo, Wei] Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.
通讯机构：
[Li, Yuehua] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Kinetic energy;Kinetics;Laser beams;Photoelectrons;Photons;Rydberg states;Intermediate state;Photoelectron imaging;Photoelectron kinetic energy;Photoelectron peaks;Photoelectron spectrum;Quantum manipulation;Resonant/nonresonant population;Simultaneous measurement;Photoelectron spectroscopy
摘要：
The simultaneous measurement of the photoelectron kinetic energy and angular distributions of NO were performed as a function of 410 nm laser intensities by femtosecond photoelectron imaging. The photoelectron kinetic energies are nearly independent of the laser intensities. The insensitivity of the photoelectron kinetic energy to the laser peak intensity suggests that peaks in the photoelectron spectra result from Freemen resonance, characteristic of the occurrence of real population on the intermediate states. The relative amplitudes of photoelectron peaks indicate that lower laser intensities emphasize the resonant population while higher laser intensities favor nonresonant population. The A2 Σ+(υ = 2) state can be weakly coupled to the BΠ2(υ=4) state, results in a small part of population on BΠ2(υ=4) state transferred from A2 Σ+(υ = 2) state. The strong field effect leads to more anisotropy of ATI than that of non-ATI. The modulation of populations in electronic states can be achieved by adjusting laser peak intensities. The results can provide some important basis for realizing quantum manipulation of molecules experimentally. © 2018 Elsevier GmbH
语种：
英文
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基于工程教育专业认证的师资队伍建设实践
作者：
郭玮;李月华;刘珺
期刊：
教育现代化 ,2018年5(47):121-122 ISSN：2095-8420
作者机构：
南华大学 电气工程学院,湖南 衡阳,421001;[郭玮; 李月华; 刘珺] 南华大学
关键词：
工程教育专业认证;师资队伍建设;认证标准
摘要：
根据中国工程教育专业认证标准对电子信息工程专业师资队伍建设进行了实践研究。从学生指导活动、教师参与指导的措施及取得的成效三方面对标准要求的达成进行探讨。本研究为高等工程教育改革及其它院校工科专业参与专业认证提供重要参考。
语种：
中文
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基于工程教育专业认证的课程体系构建探讨——以南华大学电子信息工程专业工程教育专业认证为例
作者：
李月华;郭玮;杨斌;陈忠泽;盛义发;...
期刊：
教育现代化 ,2018年5(14):107-111 ISSN：2095-8420
作者机构：
南华大学 电气工程学院,湖南 衡阳;[郭玮; 盛义发; 李月华; 陈忠泽; 杨斌; 王新林] 南华大学
关键词：
工程教育;专业认证;课程体系
摘要：
根据中国工程教育专业认证标准,为进一步深化本科教学改革,丰富人才培养内涵,提升人才培养质量,本文根据地方电子产业发展实际,面向国内外电子信息产业和行业的发展,首先介绍了教育部工程教育专业认证下的电子信息工程专业课程体系构建流程,重点阐述了实践课程体系的构建,以及本专业在课程体系改革方面的主要举措等,为其它院校工科专业参与工程教育专业认证课程体系构建提供参考。
语种：
中文
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Delay time dependence of wave packet motion and population transfer of four-level K2 molecule in pump–pump–probe pulses
作者：
Chang, Zhiqiang;Li, Changming;Guo, Wei* ;Yao, Hongbin
期刊：
中国物理B ,2018年27(5):053301 ISSN：1674-1056
通讯作者：
Guo, Wei
作者机构：
[Guo, Wei; Chang, Zhiqiang; Li, Changming] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Guo, Wei] Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.;[Yao, Hongbin] Xinjiang Inst Engn, Key Lab New Energy & Mat, Urumqi 830091, Peoples R China.
通讯机构：
[Guo, Wei] U;[Guo, Wei] D;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.
关键词：
Fourlevel ladder K2 molecule;Intense femtosecond pump1-pump2-probe pulse;Population transfer;Wave packet motion
摘要：
The effect of delay time on photoelectron spectra and state populations of a four-level ladder K2 molecule is investigated by a pump1–pump2–probe pulse via the time-dependent wave packet approach. The periodical motion of the wave packet leads to the periodical change of the photoelectron spectra. The Autler–Townes triple splitting appears at zero delay time, double splitting appears at nonzero delay time between pump1 and pump2 pulses, and no splitting appears at nonzero delay time between pump2 and probe pulses. The periodical change of the state populations with the delay time may be due to the coupling effect between the two pulses. It is found that the selectivity of the state populations may be attained by regulating the delay time. The results can provide an important basis for realizing the optical control of molecules experimentally.
语种：
英文
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飞秒激光脉宽对非绝热耦合分子波包运动的影响研究
作者：
郭玮;王怡;李月华;路兴强
期刊：
原子与分子物理学报 ,2018年35(3):455-460 ISSN：1000-0364
作者机构：
南华大学 电气工程学院,衡阳 421001;中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023;南华大学 电气工程学院,衡阳,421001;南华大学 核科学技术学院,衡阳,421001;[郭玮; 路兴强; 李月华; 王怡] 南华大学
关键词：
分子物理学;波包运动;含时波包法;非绝热耦合NaI分子;态布居;激发概率;解离概率
摘要：
利用含时波包法研究了强飞秒泵浦-探测激光场中激光脉宽对非绝热耦合NaI分子波包运动的影响.发现波包的振荡周期随脉宽增长而增大,而振荡幅度随脉宽增长而减小.非绝热效应引起的波包在交叉区域的分裂情况影响各态布居.脉宽增长,NaI分子的激发概率增大,而解离概率减小.研究表明调节激光场脉宽可实现对波包运动的控制从而控制态布居的选择性分布.研究结果可以为实验上实现分子的光控制以及量子调控过程提供一定的参考.
语种：
中文
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“工程电磁场”课程研究性学习的实践研究
作者：
郭玮;路兴强;李月华
期刊：
教育现代化 ,2017年(03):60-61 ISSN：2095-8420
作者机构：
南华大学电气工程学院
关键词：
工程电磁场;研究性学习;实践研究
摘要：
摘要:本文在学习和研究国内外研究性学习理论的基础上,对"工程电磁场"课程实践研究性学习。通过研究课程教学中科研元素的介入对教学的调制,探讨了科研成果向教学资源转化的有效方式。通过研究课程教学中科研元素的介入对科研的反馈,探讨了教学提高科研质量,推动科研活动可持续性发展,推动教师专业化发展的有效方式。实践大学生研究性学习对深化大学本科教学改革,培养大学生创新能力有十分重要的意义。
语种：
中文
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高校嵌入式系统人才培养模式探究——基于“卓越工程师”培养计划
作者：
李月华;郭玮;杨斌;陈忠泽;朱卫华
期刊：
新西部：下旬·理论 ,2017年(03):111-112 ISSN：1009-8607
作者机构：
南华大学电气工程学院 湖南衡阳 421001;[郭玮; 李月华; 陈忠泽; 杨斌; 朱卫华] 南华大学
关键词：
嵌入式系统;卓越工程师;人才培养;特点;不足;改革路径
摘要：
嵌入式系统是实现"中国制造2025"的主要载体,而培养优秀的嵌入式系统卓越工程师是关键.本文分析了嵌入式系统工程技术人才的特点、市场需求与目前高校嵌入式系统课程体系存在的不足,探讨了打破高校在嵌入式系统技术人才培养瓶颈的改革路径,以期扎实推进嵌入式系统卓越工程师培养的各项建设工作.
语种：
中文
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飞秒激光脉宽对三态阶跃型分子波包运动的影响研究
作者：
郭玮;常志强;王怡;路兴强
期刊：
原子与分子物理学报 ,2017年34(5):908-914 ISSN：1000-0364
作者机构：
南华大学电气工程学院,衡阳421001;中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023;南华大学电气工程学院,衡阳,421001;南华大学核科学技术学院,衡阳,421001;[郭玮; 路兴强; 常志强; 王怡] 南华大学
关键词：
分子物理学;波包运动;含时波包法;三态阶跃型K2分子;光电子能谱;态布居数
摘要：
用含时波包法研究了三态阶跃型K2分子在强飞秒泵浦-探测激光场中脉宽对波包动力学过程的影响.研究表明激光场强较弱或者脉宽较短都可能不出现Autler-Townes分裂.波包的振荡周期随脉宽增长而增大,而振荡幅度随脉宽增长而减小.脉宽影响Rabi振荡,而Rabi振荡的变化又导致了基态和激发态布居数周期性变化.首次量化了脉宽对激发态布居数的影响,表明变化频率随着泵浦场强的增强而增大.研究表明调节激光脉宽可实现对态布居数的选择性分布,可以为实验上实现分子的光控制提供重要参考.
语种：
中文
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The Delay Time Dependence of the Photoelectron Spectra and State Populations of Three-Level Ladder K-2 Molecule(1)
作者：
Guo, Wei;Lu, Xingqiang* ;Wang, Xinlin
期刊：
Russian Journal of Physical Chemistry A ,2017年91(2):366-372 ISSN：0036-0244
通讯作者：
Lu, Xingqiang
作者机构：
[Guo, Wei; Wang, Xinlin] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Guo, Wei] Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China.;[Lu, Xingqiang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Lu, Xingqiang] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
photoelectron spectra;state populations;time-dependent wave packet approach;three-level ladder K2 molecule
摘要：
The delay time dependence of photoelectron spectra and state populations of three-level ladder K2 molecule is investigated by pump-probe pulses via time-dependent wave packet approach. The periodical motion of the wave packet with oscillating period 500 fs results in the periodical variation of photoelectron spectra. The photoelectron spectra show Autler-Townes double splitting at zero delay time, and no splitting at positive delay time. The periodical change of state populations with delay time can be ascribed to the coupling effect between the two pulses. It is found that the selectivity of the state populations may be attained by regulating the delay time. The results can provide some important basis for realizing the optical control of molecules experimentally.
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英文
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Dependence of Surface Plasmons on Unit Structure Edge Sharp Features
作者：
Sheng, Jiabing;Yuan, Zhi;Chen, Zhiyong* ;Zhu, Weihua;Guo, Wei;...
期刊：
Plasmonics ,2017年12(3):795-801 ISSN：1557-1955
通讯作者：
Chen, Zhiyong;Wang, Xinlin
作者机构：
[Zhu, Weihua; He, Hongyu; Guo, Wei; Wang, Xinlin; Sheng, Jiabing; Chen, Zhiyong; Wang, XL; Yuan, Zhi] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Wang, Xinlin] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, ZY; Wang, XL; Wang, Xinlin] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
关键词：
Enhanced optical transmission;Finite-difference time-domain;Localized surface plasmon resonance;Subwavelength metallic film hole arrays;Unit structural features
摘要：
The relation between the enhanced optical transmission and the unit structural features is studied by changing the unit structural features. 3D finite-difference time-domain method is employed to study the enhanced optical transmission of periodic subwavelength circular-sharps shaped hole arrays in metallic films which are deposited on a quartz substrate. The influences of the unit structural features on the enhanced optical transmission are investigated. It is found that the enhanced optical transmission strongly depends on the unit structural edge sharp features: the sharp acuity, numbers, and distributions. The sharp acuity and numbers influence the enhanced optical transmission via localized surface plasmon resonance mode. The sharp distributions affect the enhanced optical transmission equaling to the effect of polarization properties. The results show that the surface plasmons strongly depend on unit structure edge sharp features. Changing the unit structural edge sharp features, the properties of the enhanced optical transmission can be tailored. This paper provides theoretical support for building the various functions of new plasmonic devices.
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飞秒激光参数对非绝热耦合分子态布居的影响
作者：
郭玮;白静;李月华
期刊：
计算物理 ,2017年34(1):119-125 ISSN：1001-246X
通讯作者：
Li, Y.
作者机构：
[郭玮; 白静; 李月华] 南华大学电气工程学院, 湖南, 衡阳, 421001
通讯机构：
School of Electrical Engineering, University of South China, Hengyang, China
关键词：
强飞秒泵浦- 探测激光;非绝热耦合NaI分子;含时波包法;态布居
摘要：
利用含时波包法研究强飞秒泵浦-探测激光场中激光脉宽、波长和场强对非绝热耦合NaI分子各态布居的影响.波包在势能面上做周期性运动,周期约为1 000 fs.延时为200 fs时,波包第一次到达交叉区域分裂成两部分.波包在交叉区域的分裂情况影响各态布居.脉宽增长,NaI分子的激发概率增大,而解离概率减小.泵浦波长为共振波长318 nm时,激发概率最大.泵浦波长增长,NaI分子的解离概率减小.泵浦场强增大,激发概率增大,但解离概率不变.探测激光波长和场强不影响NaI分子各态布居分布.调节激光场参数可实现对波包运动的控制从而控制态布居的选择性分布.研究结果为实验上实现分子的光控制过程提供参考.
语种：
中文
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飞秒泵浦-探测脉冲下布居转移的场依赖研究
作者：
郭玮;路兴强
期刊：
量子电子学报 ,2017年34(5):562-569 ISSN：1007-5461
作者机构：
School of Electrical Engineering, University of South China, State Key Laboratory of Molecule Reaction Dynamics, Hengyang, 421001;School of Electrical Engineering, University of South China, Hengyang, 421001;[郭玮] School of Electrical Engineering, University of South China, State Key Laboratory of Molecule Reaction Dynamics, Hengyang, 421001;[路兴强] School of Electrical Engineering, University of South China, Hengyang, 421001
关键词：
quantum optics;population transfer;time-dependent wave packet method;Rabi oscillation
摘要：
The effects of pump intensity, pump wavelength and pulse width on state populations of three-level ladder K_2 molecule driven by intense femtosecond pump-probe pulses are investigated and firstly quantified by employing the time-dependent wave packet method. The pump intensity, pump wavelength and pulse width affect Rabi oscillation, which results in the periodical change of the populations of electronic states. The effect of quantization field parameters on population of the excited state shows that the change frequency varies with increasing of pump intensity and pulse width. Results provide an important reference for realizing the molecule optical control in experiment and further study of K_2 molecule dynamic properties.
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英文
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飞秒激光参数对四态阶跃型分子光电子能谱的影响
作者：
李月华;郭玮
期刊：
计算物理 ,2016年33(4):453-459 ISSN：1001-246X
通讯作者：
Guo, W.
作者机构：
[李月华; 郭玮] 南华大学电气工程学院, 湖南, 衡阳, 421001
通讯机构：
School of Electrical Engineering, University of South China, Hengyang, China
关键词：
含时波包法;四态阶跃型K_2分子;光电子能谱;Autler-Townes分裂
摘要：
利用含时波包法研究三激光场中四态阶跃型K_2分子光电子能谱的Autler-Townes(AT)分裂.研究第二束激光场强和波长对AT分裂的影响.共振时,光电子谱为对称三分裂,非共振时,不对称三分裂逐渐变为双分裂.波长增加,谱峰以不等位移向低能方向移动.边峰间距不随波长的改变而改变,随场强增强而增大.研究结果为进一步从第一性原理的理论研究提供有用的信息,为实现分子的光控制及量子调控提供重要参考.
语种：
中文
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A study on interactions between ions and polarized Alfven waves below cyclotron resonance frequency
作者：
Lu, Xing-Qiang;Tang, Wei-Zhong;Guo, Wei* ;Gong, Xue-Yu
期刊：
PHYSICS OF PLASMAS ,2016年23(12):122114 ISSN：1070-664X
通讯作者：
Guo, Wei
作者机构：
[Lu, Xing-Qiang; Gong, Xue-Yu; Tang, Wei-Zhong] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Guo, Wei] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Guo, Wei] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
plasma Alfven waves;plasma collision processes;plasma heating;plasma simulation
摘要：
Ion heating by different polarized Alfvén waves below the cyclotron resonance frequency is studied using test-particle simulation. The results indicate that the interactions between ions and waves are affected by the polarization and frequency of the waves. If the frequency of waves is higher (ω>0.1 Ω<inf>p</inf>), the interactions between ions and left-hand (LH) waves are stronger than right-hand (RH) waves due to the sub-cyclotron resonance. However, with the decrease of the frequency, the interactions between different polarized Alfvén waves and particles tend to be the same. The heating effects of LH waves on ions are better than RH waves at higher frequencies. When the frequency of the waves is lower enough (ω<0.1 Ω<inf>p</inf>), the heating effects of LH waves and RH waves on ions are almost identical. The change of heating efficiency with the polarization and frequency of the waves is consistent with the change of the heating effect. ©2016 Author(s).
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