Near-infrared dual-wavelength plasmonic switching and digital metasurface unveiled by plasmonic Fano resonance
作者：
Ou, Jie;Luo, Xiao-Qing* ;Luo, You-Lin;Zhu, Wei-Hua;Chen, Zhi-Yong;...
期刊：
Nanophotonics ,2021年10(2):947-957 ISSN：2192-8606
通讯作者：
Luo, Xiao-Qing;Wang, Xin-Lin
作者机构：
[Luo, Xiao-Qing; Chen, Zhi-Yong; Luo, XQ; Wang, Xin-Lin; Ou, Jie; Luo, You-Lin; Zhu, Wei-Hua] Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultrafast Micro Nano Technol &, Hengyang 421001, Peoples R China.;[Luo, Xiao-Qing; Liu, Wu-Ming] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.;[Wang, Xin-Lin; Liu, Wu-Ming] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Liu, Wu-Ming] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China.
通讯机构：
[Luo, XQ; Wang, XL; Wang, Xin-Lin] U;[Luo, Xiao-Qing] C;Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultrafast Micro Nano Technol &, Hengyang 421001, Peoples R China.;Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.;Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
关键词：
Delta modulation;Infrared devices;Nanostructures;Optical communication;Polarization;Resonance;Dependent characteristics;Geometric configurations;Information transfers;Light-matter interactions;Optical communication bands;Subwavelength nanostructures;Transmitted spectra;Tunable wavelength;Plasmonics
摘要：
Plasmonic Fano resonance (FR) that contributes to multitudinous potential applications in subwavelength nanostructures can facilitate the realization of tunable wavelength selectivity for controlling light-matter interactions in metasurfaces. However, the plasmonic FR can be generated in metasurfaces with simple or complex geometries, and few of them can support flexible amplitude modulation and multiwavelength information transfer and processing. Here, we study the near-infrared plasmonic FR in a hybrid metasurface composed of concentrically hybridized parabolic-hole and circular-ring-aperture unit cells, which can induce polarization-dependent dual-wavelength passive plasmonic switching (PPS) and digital metasurface (DM). It is shown that the designable plasmonic FR can be realized by changing the geometric configurations of the unit cells. In particular, owing to the polarization-dependent characteristic of FR, it is possible to fulfill a compact dual-wavelength PPS with high ON/OFF ratios in the related optical communication bands. Moreover, such PPS that manipulates the amplitude response of the transmitted spectrum is an efficient way to reveal a 1-bit DM, which can also be rationally extended to a 2-bit DM or more. Our results suggest a pathway for studying polarization-dependent PPS and programmable metasurface devices, yielding possibilities for subwavelength nanostructures in optical communication and information processing. © 2020 Jie Ou et al., published by De Gruyter, Berlin/Boston 2020.
语种：
英文
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Displacement Cascades in Monocrystalline Silicon: Effects of Temperature, Strain, and PKA Energy
作者：
Zhou, Yuan;Chen, Bing;He, Hongyu;Li, Bo* ;Wang, Xinlin*
期刊：
Nuclear Technology ,2020年206(1):32-39 ISSN：0029-5450
通讯作者：
Wang, Xinlin;Li, Bo
作者机构：
[He, Hongyu; Chen, Bing; Wang, Xinlin; Zhou, Yuan] Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultrafast Micro Nano Technol &, Hengyang 421001, Peoples R China.;[Li, Bo] China Acad Engn Phys, Inst Fluid Phys, Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Sichuan, Peoples R China.
通讯机构：
[Wang, Xinlin] U;[Li, Bo] C;Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultrafast Micro Nano Technol &, Hengyang 421001, Peoples R China.;China Acad Engn Phys, Inst Fluid Phys, Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Sichuan, Peoples R China.
关键词：
Defects;Hydraulics;Molecular dynamics;Monocrystalline silicon;Silicon;Strain;Strain measurement;Defect generation;Displacement cascades;Effect of temperature;Effects of temperature;Hydrostatic loading;Hydrostatic strain;Large-scale molecular dynamics;Primary knock-on atoms;Temperature
摘要：
With large-scale molecular dynamics, we investigate displacement cascades in monocrystalline silicon with regard to the effects of temperature, strain, and primary knock-on atom energy on defect generation and evolution. With temperature increasing, both the thermal spike region and the peak defect count increase, while the effect of temperature on the surviving defect number is negligible. Nevertheless, higher temperature shows negative effect on clustering of vacancy. The effects of uniaxial strain on defect production and clustering is negligible, while its hydrostatic counterpart is evident. With the increment of hydrostatic strain, both the peak and surviving defect count increase (decrease) under tensile (compressive) hydrostatic loading. Meantime, tensile hydrostatic strain will promote defect clustering. More defects and larger defect clusters are produced at higher energy. Otherwise, interstitials are hard to form clusters under different conditions. © 2019, © 2019 American Nuclear Society.
语种：
英文
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Analytical Drain Current and Capacitance Model for Amorphous InGaZnO TFTs Considering Temperature Characteristics
作者：
He, Hongyu* ;Xiong, Chao;Yin, Junli;Wang, Xinlin;Lin, Xinnan;...
期刊：
IEEE Transactions On Electron Devices ,2020年67(9):3637-3644 ISSN：0018-9383
通讯作者：
He, Hongyu
作者机构：
[He, Hongyu; Wang, Xinlin; Yin, Junli] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[He, Hongyu; Zhang, Shengdong; Lin, Xinnan] Peking Univ, Shenzhen Grad Sch, Sch Elect & Comp Engn, Shenzhen 518005, Peoples R China.;[Xiong, Chao] Changzhou Inst Technol, Sch Photoelect Engn, Changzhou 213032, Jiangsu, Peoples R China.
通讯机构：
[He, Hongyu] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Numerical models;Analytical models;Capacitance;Mathematical model;Temperature;Electron traps;Integrated circuit modeling;Capacitance model;drain current model;field-effect mobility;InGaZnO (IGZO);temperature characteristics;thin-film transistor (TFT)
摘要：
Analytical drain current and capacitance model is developed for the amorphous InGaZnO (a-IGZO) thin-film transistor (TFT). The numerical Pao-Sah model is presented to describe the temperature characteristics considering the deep and tail trap states in the energy gap of the a-IGZO thin film. The numerical model is successful for the TFT in both the subthreshold regime and the above-threshold regime. In the subthreshold regime, considering that the trapped electron concentration in the deep trap states dominates the Poisson's equation, the surface-potential-based analytical model is presented. In the above-threshold regime, the threshold-voltage-based analytical model is presented. Applying the smooth function to connect the subthreshold model and the above-threshold model, the analytical compact model is obtained. The compact model is verified by the numerical Pao-Sah model and the available experimental data from 253 to 393 K. Furthermore, the temperature characteristics of the field-effect mobility are discussed.
语种：
英文
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Modeling of Both Arrhenius and Non-Arrhenius Temperature-Dependent Drain Current for Organic Thin-Film Transistors
作者：
He, Hongyu* ;Xiong, Chao;Yin, Junli;Wang, Xinlin;Lin, Xinnan;...
期刊：
IEEE Transactions On Electron Devices ,2020年67(11):5091-5096 ISSN：0018-9383
通讯作者：
He, Hongyu
作者机构：
[He, Hongyu; Wang, Xinlin; Yin, Junli] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[He, Hongyu; Zhang, Shengdong; Lin, Xinnan] Peking Univ, Shenzhen Grad Sch, Sch Elect & Comp Engn, Shenzhen 518005, Peoples R China.;[Xiong, Chao] Changzhou Inst Technol, Sch Photoelect Engn, Changzhou 213032, Jiangsu, Peoples R China.
通讯机构：
[He, Hongyu] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Carrier concentration;drain current model;temperature characteristics;thin-film transistor (TFT);trap states
摘要：
To describe both Arrhenius and non-Arrhenius temperature-dependent drain currents for the organic thin-film transistors, the effective trapped carrier concentration expression is presented. Based on the expression, following the Shur and Hack's trap limited carrier conduction theory, the analytical drain current model is developed. The temperature-dependent trap states' density is presented to explain the origin of the effective trapped carrier concentration expression. © 1963-2012 IEEE.
语种：
英文
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基于改进型双频注入法的绝缘监测装置设计
作者：
胡亦龙;曾铁军;李玉姣;余松;刘鎏;...
期刊：
仪表技术与传感器 ,2020年2020(7):47-51 ISSN：1002-1841
作者机构：
南华大学电气工程学院,湖南衡阳 421000;中国核动力研究设计院反应堆系统设计技术重点实验室,四川成都 610200;[曾铁军; 胡亦龙; 刘华; 王新林; 文杰; 余松] 南华大学;[刘鎏; 李玉姣] 中国核动力研究设计院
关键词：
IT系统;双频注入法;绝缘监测;装置设计;试验分析
摘要：
在理论与实践的基础上,根据IT系统运行特性,采用改进型的双频注入法,设计并制作了在线绝缘监测样机,用于实时在线监测核反应堆稳压器加热系统绝缘状态。并在实验室搭建的试验平台上进行了离线与在线试验,验证了装置能够准确检测500 kΩ范围内绝缘阻值,检测精度在5%以内。
语种：
中文
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基于FPGA的分数倍抽取滤波器的改进设计与应用
作者：
李恩琦;龚小竞;朱卫华;舒承有;陈潮斌;...
期刊：
南华大学学报(自然科学版) ,2020年34(1):52-59 ISSN：1673-0062
作者机构：
南华大学 电气工程学院,湖南 衡阳421001;中国科学院深圳先进技术研究院生物医学光学与分子影像研究室,广东 深圳518060;[龚小竞; 舒承有; 陈潮斌] 中国科学院深圳先进技术研究院;[朱卫华; 王新林; 李恩琦] 南华大学
关键词：
FIR分数倍抽取滤波器;插值;抽取;资源优化
摘要：
为了滤除医学超声成像系统中数据采集的噪声,提高图像的完整度,保证图像实时显示帧率及减少FPGA硬件资源的占用,在传统的FIR分数倍抽取滤波器的基础上,提出了一种改进结构。此结构仅利用一个乘法器,解决了传统结构中资源占用多,插值、抽取操作效率低等问题,提高了系统的工作效率和稳定性。通过Matlab、Vivado、Questasim仿真测试及系统成像对比,验证了此结构的可行性,与其他结构滤波器相比,减少了对Dsp、Bram等硬件资源的占用,以满足系统的实际需求。
语种：
中文
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改进型单频法绝缘监测装置设计
作者：
余松;曾铁军;李玉姣;胡亦龙;刘鎏;...
期刊：
中国测试 ,2020年46(6):78-82 ISSN：1674-5124
作者机构：
南华大学电气工程学院,湖南衡阳421000;中国核动力研究设计院反应堆系统设计技术重点实验室,四川成都610200;[曾铁军; 胡亦龙; 刘华; 王新林; 文杰; 余松] 南华大学;[刘鎏; 李玉姣] 中国核动力研究设计院
关键词：
绝缘监测;改进型单频法;IT系统;数据采集;高精度
摘要：
为保证核反应堆稳压器电加热器运行的可靠性,设计一款在线绝缘监测装置,对稳压器电加热器及其供电系统绝缘状态进行实时监测。为满足宽范围,高精度的绝缘电阻检测需求提出一种改进型单频法,并在Simulink中建立仿真模型对改进型单频注入法原理进行仿真验证,仿真数据表明绝缘电阻在800 kΩ以内时计算误差在±5%以内。在绝缘监测装置中针对改进型单频法设计一个注入源信号采集电路用来提取夹杂在强工频噪声中的注入源信号,并利用现有实验条件搭建在线试验平台对该装置进行整体性能测试,测试表明该装置能够准确测量500 kΩ以内的绝缘电阻误差在±5%以内。
语种：
中文
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基于周期性亚波长复合单元结构的表面等离子体光开关
作者：
易建基;罗晓清;陈志勇;朱卫华;王新林
期刊：
电子技术与软件工程 ,2020年(3):91-93 ISSN：2095-5650
作者机构：
南华大学电气工程学院超快微纳技术与激光先进制造湖南省重点实验室;[易建基; 陈志勇; 朱卫华; 王新林; 罗晓清] 南华大学
关键词：
周期性亚波长孔阵列;局域表面等离子体共振;表面等离子体光开关
摘要：
本文研究了包括圆环结构、内置纳米棒的空心圆结构和复合结构周期性亚波长孔阵列的增强光透射特性,并证实了在复合结构中的内置纳米棒的空心圆环境的光场局域强度能够被显著地增强。此外,通过调控入射光的偏振方向,复合结构中纳米棒和空心圆的局域表面等离子体共振响应模式会发生相互转换。另外,我们设计了一种新型紧凑无泵浦光干扰并具有双通道的表面等离子体光开关。最后,该结果为表面等离子体光子器件提供了一种新思路,并拓展了微纳结构在光学通信及信息处理领域的应用范围。
语种：
中文
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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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Influence of the Cr interlayer on the microstructure of sputtered TiN coatings deposited on zirconium alloy
作者：
Yang, Kai;Liao, Bangliang;Zhu, Hongmei;Zhu, Weihua;He, Hongyu;...
期刊：
Materials Research Express ,2019年6(2):026420 ISSN：2053-1591
作者机构：
[Yang, Kai; Liao, Bangliang; Zhu, Hongmei; Wang, Xinlin] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Zhu, Weihua; He, Hongyu; Wang, Xinlin] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Liu, Yanhong; Li, Huailin] State Power Investment Corp Sci & Technology Res, Beijing 102209, Peoples R China.
关键词：
Electric furnaces;Inorganic coatings;Morphology;Oxidation resistance;Physical vapor deposition;Protective coatings;Scanning electron microscopy;Spectrometers;Surface roughness;Thermooxidation;Titanium dioxide;Titanium nitride;Zircaloy;Zirconium alloys;Average grain size;Dc magnetron sputtering;Energy dispersive spectrometers;High-temperature oxidation test;Measuring instruments;Multi coating;Multiarc ion plating;X ray diffractometers;Titanium alloys
摘要：
On the surface of zirconium alloy, the TiN coatings with and without Cr interlayer were prepared in the N2/Ar mixed gas atmosphere by physical vapor deposition technology. The coatings morphology, micro-composition of surface particles, surface roughness, phase constituent and high-temperature oxidation resistance were characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), roughness measuring instrument, x-ray diffractometer (XRD) and chamber electric furnace, respectively. The results show that, in comparison with the TiN coatings, the gray large particles increase in volume and the striated gullies reduce significantly for the Cr/TiN coatings. With the presence of Cr interlayer, the roughness of coatings increases, TiN (111) plane shows a weak growth, and the average grain size becomes small, while the average compressive strain increases. After the high-temperature oxidation test, there is a dense mixture of TiO2 and Cr2O3 on the surface of the Cr/TiN coatings which is continuous and complete without any defects such as cracks and holes. The Cr/TiN coatings enhanced the oxidation resistance of zirconium substrate, evidenced with 1/3 oxidation weight gain of that of the zirconium alloy. These results demonstrate the effectiveness of Cr/TiN coating as a protective coating on the zirconium alloy under extreme conditions. © 2018 IOP Publishing Ltd.
语种：
英文
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掺杂低含量SiO_2对激光熔覆CaP 生物陶瓷涂层性能的影响
作者：
刘均环;朱卫华;朱红梅;施佳鑫;管旺旺;...
期刊：
红外与激光工程 ,2019年48(6):341-347 ISSN：1007-2276
通讯作者：
Wang, Xinlin(wxl_ly000@aliyun.com)
作者机构：
南华大学机械工程学院,湖南衡阳,421001;南华大学电气工程学院,湖南衡阳421001;超快微纳技术与激光先进制造湖南省重点实验室,湖南衡阳421001;南华大学机械工程学院,湖南衡阳421001;南华大学电气工程学院,湖南衡阳,421001
通讯机构：
[Wang, X.] S;School of Mechanical Engineering, China
关键词：
激光熔覆;TC4钛合金;SiO2-HA涂层;耐腐蚀性能;生物活性
摘要：
为提高医用TC4钛合金表面熔覆羟基磷灰石(HA)涂层的植入稳定性和生物活性, 采用激光熔覆方法制备出不同含硅量的CaP生物陶瓷涂层。利用扫描电子显微镜(SEM)和X射线衍射仪(XRD)表征了熔覆层组织形貌和物相组成。结果表明: 添加SiO2(1wt.%、3wt.%)后形成Ca2SiO4相, 熔覆层中部组织细化。通过电化学腐蚀和体外SBF浸泡实验研究了SiO2含量对涂层耐腐蚀性和生物活性的影响。电化学腐蚀结果表明: 随着SiO2含量的增大, 涂层表面腐蚀电流密度逐渐减小; 体外SBF浸泡结果表明: 添加SiO2可以加快涂层表面类骨磷灰石的形成, 其中, 添加SiO2为1wt.%时涂层表面类骨磷灰石呈均匀分布。因此, 低含量SiO2可以提高生物陶瓷涂层的耐腐蚀性和生物活性。 To improve the implantation stability and biological activity of the hydroxyapatite(HA) coating on the surface of medical TC4 titanium alloy, CaP bioceramic coating with different silicon contents were prepared by laser cladding method. Scanning electron microscopy(SEM) and X-ray diffractometry(XRD) were used to characterize the morphology and phase composition of the cladding layer. The results showed that the Ca2SiO4 phase was formed and the microstructure of the middle zone of the cladding layer was refined after adding SiO2(1wt.%, 3wt.%). The effects of SiO2 content on the corrosion resistance and bioactivity of the coating were investigated by electrochemical corrosion and in vitro SBF immersion experiments. Electrochemical corrosion results showed that the corrosion current density of the coating surface decreased with the increase of SiO2 content; The results of SBF soaking in vitro showed that the addition of SiO2 could accelerate the formation of bone-like apatite on the surface of the coating. When the content SiO2 was 1 wt.%, the surface of the coating-like bone apatite was uniformly distributed. Therefore, low-content SiO2 can improve the corrosion resistance and bioactivity of bioceramic coatings.
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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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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Dark solitons manipulation using optical event horizon
作者：
Deng, Zhixiang;Liu, Jun* ;Huang, Xianwei;Zhao, Chujun;Wang, Xinlin
期刊：
Optics Express ,2018年26(13):16535-16546 ISSN：1094-4087
通讯作者：
Liu, Jun
作者机构：
[Deng, Zhixiang; Wang, Xinlin] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Liu, Jun] Shenzhen Univ, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China.;[Liu, Jun] Aston Univ, Aston Inst Photon Technol, Sch Engn & Appl Sci, Birmingham B4 7ET, W Midlands, England.;[Huang, Xianwei] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China.;[Zhao, Chujun] Hunan Univ, Sch Phys & Elect, IFSA Collaborat Innovat Ctr, Lab Micro Nanooptoelect Devices,Minist Educ, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Liu, Jun] S;[Liu, Jun] A;Shenzhen Univ, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China.;Aston Univ, Aston Inst Photon Technol, Sch Engn & Appl Sci, Birmingham B4 7ET, W Midlands, England.
关键词：
Linear stability analysis;Probes;Stars;Adiabatic variation;Collisional dynamics;Event horizon;Integrable systems;Intrinsic mechanisms;Nonlinear interactions;Power adjustments;Propagation properties;Solitons;adiabaticity;article;black hole;velocity
摘要：
We demonstrate that the optical event horizon can provide an effective technique to actively control the propagation properties of a dark soliton with another weak probe wave. Careful power adjustment of the probe wave enables the black soliton converted into a gray one with varying grayness through the nonlinear interaction, corresponding to a nearly adiabatic variation of the soliton’s speed. The sign of the phase angle for the newly formed gray soliton at optical event horizon is significantly dependent on the frequency of the launched probe wave. Linear-stability analysis of dark solitons under the perturbation of a weak probe wave is performed to clarify the intrinsic mechanism of the nonlinear interaction. The probe wave manipulated collisional dynamics between both dark solitons are investigated as an analogue of the combined white-hole and black-hole horizons which provides some insights into exploring the transition between integrable and non-integrable systems. © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
语种：
英文
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钛合金表面激光熔覆制备低含硅量生物陶瓷涂层
作者：
孙楚光;刘均环;陈志勇;朱卫华;朱红梅;...
期刊：
红外与激光工程 ,2018年47(3):306003 ISSN：1007-2276
通讯作者：
Wang, Xinlin(wxl_ly000@aliyun.com)
作者机构：
[孙楚光; 刘均环; 朱红梅; 何彬; 王新林] School of Mechanical Engineering, University of South China, Hengyang;421001, China;[陈志勇; 朱卫华] School of Electrical Engineering, University of South China, Hengyang;[孙楚光; 刘均环; 陈志勇; 朱卫华; 朱红梅; 何彬; 王新林] 421001, China;[王新林] 421001, China <&wdkj&> School of Electrical Engineering, University of South China, Hengyang
通讯机构：
[Wang, X.] S;School of Mechanical Engineering, China
关键词：
激光熔覆;TC4钛合金;含硅生物陶瓷涂层;生物活性;耐腐蚀性能
摘要：
采用5 kW横流CO2激光器对表面预涂覆HA和SiO2混合粉末的TC4钛合金激光熔覆获得低含硅量生物陶瓷涂层。利用X射线衍射仪(XRD)、扫描电镜(SEM)、X射线能谱仪(EDS)分析熔覆层的显微组织与物相成分, 通过模拟体液(SBF)浸泡实验初步探讨涂层的生物活性, 并通过电化学腐蚀中的动电位扫描实验研究涂层在SBF中的腐蚀行为。实验结果表明, 低含硅量生物陶瓷涂层与基体呈冶金结合, 在SBF中熔覆层的腐蚀电位与基材相比提高了84.4 mV, 腐蚀电流密度下降了约6倍, 在SBF中浸泡7天后熔覆层表面沉积了大量的类骨磷灰石, 熔覆层表现出良好的耐腐蚀性和生物相容性。 The bio-ceramic coatings containing low silicon was synthesized on TC4 titanium alloy pre-coated HA and SiO2 powder by laser cladding with continuous wave CO2 laser. Microstructure morphology, composition and phase distributions of the composite coating were investigated respectively by scanning electron microscopy(SEM), X-ray energy-dispersive spectroscopy(EDS), X-ray diffractometer(XRD). The bioactivity of coating was investigated preliminarily in the simulated body fluid(SBF). The corrosion behavior of the coating in the SBF was studied by the potentiodynamic scanning of electrochemical corrosion. The results show that the low silicon content bio-ceramic coating was well metallurgical bonded with TC4 titanium substrate. The corrosion potential of cladding layer was improved 84.4 mV compared with substrate in SBF, the corrosion current density decreased by about 6 times compared with base material, large amount of bone like apatite was deposited on the surface of the composite coating in SBF after seven days, which show well corrosion resistance and excellent biological activity.
语种：
中文
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分子动力学模拟4H-SiC辐照下缺陷形成机理
作者：
何涛;何红宇;周媛;朱卫华;陈志勇;...
期刊：
光电技术应用 ,2017年32(5):45-51 ISSN：1673-1255
作者机构：
南华大学电气工程学院,湖南衡阳,421001;南华大学电气工程学院,湖南衡阳421001;南华大学机械工程学院,湖南衡阳421001;[何红宇; 陈志勇; 周媛; 朱卫华; 何涛] 南华大学 电气工程学院,湖南 衡阳 ;[王新林] 南华大学 电气工程学院,湖南 衡阳 <&wdkj&> 南华大学 机械工程学院,湖南 衡阳
关键词：
分子动力学;级联碰撞;缺陷
摘要：
运用分子动力学模拟的方法,采用LAMMPS程序模拟了六方晶格结构的4H-SiC材料辐照下级联碰撞过程。先建立4H-SiC晶体结构模型,再模拟了不同能量的初始碰撞原子（PKA）级联碰撞产生点缺陷的演化。模拟结果表明,总的点缺陷包括空位缺陷、间隙原子和反位缺陷,并以空位缺陷和间隙原子为主,给出空位缺陷与间隙原子的空间分布图;级联碰撞产生的空位缺陷数量与PKA能量成线性关系;空位缺陷与间隙原子的空间分布,特别是空位缺陷与间隙原子聚集区域,与PKA能量有密切关系。上述结果为分析4H-SiC基材电子器件在辐照环境下电学性质变化提供理论基础。
语种：
中文
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TC4钛合金表面激光熔覆掺Y_2O_3复合涂层的显微组织和性能
作者：
马永;朱红梅;孙楚光;廖帮亮;申龙章;...
期刊：
表面技术 ,2017年46(6):238-243 ISSN：1001-3660
作者机构：
南华大学机械工程学院, 湖南, 衡阳, 421001;南华大学电气工程学院, 湖南, 衡阳, 421001;[马永; 朱红梅; 孙楚光; 廖帮亮; 申龙章; 何彬; 王新林] 南华大学机械工程学院, 湖南, 衡阳, 421001;[朱卫华] 南华大学电气工程学院, 湖南, 衡阳, 421001
关键词：
TC4钛合金;激光熔覆;复合涂层;显微组织;显微硬度;耐磨性能
摘要：
目的提高钛合金表面的耐磨性能。方法在TiB_2:TiC=1:3的粉末配比下,添加不同质量分数Y_2O_3稀土氧化物,制备成膏状混合粉末。采用5 kW横流CO_2激光器,在TC4钛合金表面激光熔覆掺Y_2O_3的TiB_2和TiC粉末,制备耐磨性复合涂层。通过扫描电子显微镜(SEM)、X射线能谱仪(EDS)、X射线衍射仪(XRD)对激光熔覆层的微观形貌和组织成分进行了分析;用显微维氏硬度计对熔覆层的显微硬度进行了测量;用万能摩擦磨损试验机对熔覆层的耐磨性能进行了测试。结果添加4%Y_2O_3后,熔覆层中部组织明显细化,结合区由致密组织结构转变为晶须网状结构;熔覆层的最高显微硬度为1404.6HV_(0.2),是基体的3.7倍;熔覆层的磨损量减少了66.67%,且其摩擦系数有明显的降低。结论添加4%Y_2O_3对TC4钛合金表面激光熔覆TiB/TiC复合熔覆层耐磨性能有显著的提高。
语种：
中文
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Active control of adiabatic soliton fission by external dispersive wave at optical event horizon
作者：
Deng, Zhixiang;Liu, Jun* ;Huang, Xianwei;Zhao, Chujun;Wang, Xinlin
期刊：
Optics Express ,2017年25(23):28556-28566 ISSN：1094-4087
通讯作者：
Liu, Jun
作者机构：
[Deng, Zhixiang; Wang, Xinlin] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Liu, Jun] Shenzhen Univ, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov,Coll Optoelect Engn, Shenzhen 518060, Peoples R China.;[Liu, Jun] Aston Univ, Sch Engn & Appl Sci, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England.;[Huang, Xianwei] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China.;[Zhao, Chujun] Hunan Univ, Sch Phys & Elect, IFSA Collaborat Innovat Ctr, Lab Micro Nanooptoelect Devices,Minist Educ, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Liu, Jun] S;[Liu, Jun] A;Shenzhen Univ, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov,Coll Optoelect Engn, Shenzhen 518060, Peoples R China.;Aston Univ, Sch Engn & Appl Sci, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England.
关键词：
Dispersion (waves);Optical fibers;Dispersive waves;Group velocities;Higher-order solitons;Propagation properties;Pulse evolution;Soliton fission;Supercontinuum sources;Temporal separation;Solitons
摘要：
We show that the group-velocity-led optical event horizon (OEH) in optical fibers provides a convenient way to actively control the propagation property of higher-order solitons by a comparatively weak dispersive wave (DW) pulse. It has been found numerically that clean soliton breakup, a process by which a second-order soliton completely splits into a pair of constituent solitons with vastly different power proportions after interacting with the weak DW pulse, will occur while external DWs become polychromatic. The temporal separation between both constituent solitons can be controlled by adjusting the power of the external DW. The more energetic main soliton is advanced/trailed in time depending on the selected frequency of input DW pulse. We have developed an analytic formalism describing the external acting-force (AF) perturbation. These results provide a fundamental explanation and physical scaling of optical pulse evolution in optical fibers and can find applications in improved supercontinuum sources. © 2017 Optical Society of America.
语种：
英文
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飞秒激光烧蚀CuZr非晶合金机理与烧蚀区结构分析
作者：
曹友朋;陈冰;何涛;何红宇;陈志勇;...
期刊：
光电技术应用 ,2017年32(1):15 ISSN：1673-1255
作者机构：
南华大学 机械工程学院, 湖南 衡阳;南华大学 电气工程学院, 湖南 衡阳;[何红宇; 陈志勇; 朱卫华; 何涛] 南华大学 电气工程学院, 湖南 衡阳 ;[曹友朋; 陈冰] 南华大学 机械工程学院, 湖南 衡阳 ;[王新林] 南华大学 机械工程学院, 湖南 衡阳 <&wdkj&> 南华大学 电气工程学院, 湖南 衡阳
关键词：
飞秒激光;双温方程;分子动力学;非晶合金;径向分布函数
摘要：
采用结合双温模型的分子动力学的方法, 数值模拟了脉宽100 fs, 能量密度为40~200 mJ/cm2的飞秒激光与CuZr非晶合金的相互作用过程。低能量密度下, 靶材的烧蚀机制主要表现为机械破碎; 高能量密度下, 热机械蚀除和相爆炸共同存在于靶材的烧蚀过程, 随着能量密度的增加, 相爆炸成为主要蚀除机制。利用径向分布函数分析了CuZr非晶合金结构的无序性, 分析结果表明, 激光能量密度由80 mJ/cm2增加到120 mJ/cm2时, 飞秒激光与靶材相互作用过程中, 材料内部的原子保持着无序状态, 材料未发生明显晶化。 The femtosecond laser ablating CuZr amorphous alloy has been simulated using the molecular dynamics method combined with the two temperature model. The duration of laser is 100 fs and the fluence is selected from 40 mJ/cm2 to 200 mJ/cm2. At low laser fluence, the ablation mechanism of the target material is mechanical spallation. At high laser fluence, thermo-mechanical removal and phase explosion co-exist in the ablation process of the target material, and with the increase of the fluence, the phase explosion becomes the main removal mechanism. The disordering of CuZr amorphous alloy structure is analyzed by the radial distribution function. The results indicate that material atomics maintain a disordered state and no obvious crystallization is observed when the laser fluence increases from 80 mJ/cm2 to 120 mJ/cm2 during ablation process.
语种：
中文
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Zr-4合金表面激光熔覆不同类型TiN粉末的组织与性能
作者：
马建光;朱卫华;朱红梅;廖帮亮;孙楚光;...
期刊：
金属热处理 ,2017年42(1):115-119 ISSN：0254-6051
通讯作者：
Wang, X.
作者机构：
南华大学机械工程学院, 湖南, 衡阳, 421001;南华大学电气工程学院, 湖南, 衡阳, 421001;[马建光; 朱红梅; 廖帮亮; 孙楚光; 王新林] 南华大学机械工程学院, 湖南, 衡阳, 421001;[朱卫华] 南华大学电气工程学院, 湖南, 衡阳, 421001
通讯机构：
School of Mechanical Engineering, University of South China, Hengyang, Hunan, China
关键词：
锆合金;激光原位熔覆;TiN/ZrN复合涂层;摩擦磨损性能
摘要：
通过在Zr-4合金表面分别预置3种不同种类的TiN粉末,利用5 kW横流CO_2激光器在锆合金表面原位制备TiN/ZrN复合涂层。利用扫描电子显微镜(SEM) 、X射线衍射仪(XRD) 、显微硬度计和万能摩擦磨损试验机表征分析了熔覆层的显微组织、物相、显微硬度和室温干滑动摩擦磨损性能。结果表明: 3种熔覆层表层均由TiN、ZrN、ZrO_2、TiZrN_2组成,由于硬质相的存在,熔覆层均具有较高的硬度和良好的耐磨性能;其中,添加纳米TiN粉末的激光熔覆层组织最为细小均匀,熔覆层截面的硬度梯度分布最为均匀,磨损质量损失最小,磨损机制表现为磨粒磨损。
语种：
中文
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