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Cu掺杂ZnO电子结构和光学性质的第一性原理研究

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山东师范大学学报（自然科学版） 2017年第4期32卷 78-85页

作者：潘凤春林雪玲高华孙建军陈焕铭宁夏大学物理与电子电气工程学院银川750021 银川一中银川750021

基于密度泛函理论框架下的第一性原理计算方法,研究了Cu掺杂纤锌矿ZnO体系的电子结构和光学性质.计算结果表明,当Cu掺杂的原子百分比为4.17%时体系的光学吸收性能最好,且在可见光区出现了新的吸收峰.电子结构的分析表明,Cu的引入可以在... 详细信息

基于密度泛函理论框架下的第一性原理计算方法,研究了Cu掺杂纤锌矿ZnO体系的电子结构和光学性质.计算结果表明,当Cu掺杂的原子百分比为4.17%时体系的光学吸收性能最好,且在可见光区出现了新的吸收峰.电子结构的分析表明,Cu的引入可以在体系的费米能级引入由Cu-3d电子和O-2.电子相互作用形成的杂质能级,价电子由eg能级向tg能级跃迁吸收的最小光子能量约为0.12.e V,这使得Cu掺杂的ZnO体系的光学吸收边落在了红外光区,同时杂质能级的出现降低了ZnO体系的禁带宽度,提升了ZnO半导体材料对长波光子的响应并有效改善ZnO半导体的光催化活性.

关键词： ZnO Cu掺杂电子结构光学性质第一性原理计算

大规模铌酸锂光子集成系统的超快激光光刻研究进展

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科学通报 2024年第12期69卷 1528-1539页

作者：黄金鑫陈锦明刘招祥宋吕斌王冠华孙超伍荣波林锦添方致伟张海粟王哲齐家汪旻程亚中国科学院上海光学精密机械研究所强场激光物理国家重点实验室上海201800 华东师范大学物理与电子科学学院极端光机电实验室上海200241 华东师范大学精密光谱国家重点实验室上海200062 上海科技大学物质科学与技术学院上海200135

飞秒光刻辅助化学机械刻蚀技术(photolithography assisted chemo-mechanical etching,PLACE)实现了在薄膜铌酸锂(thin-film lithium niobate,TFLN)上高品质大规模光子集成电路(photonic integrated circuit,PIC)的制造,并推动了光子集成电路重大应用领域的持续发展,产生了一系列高性能PIC应用,诸如高Q微谐振器、低损耗波导、波导放大器、阵列波导光栅(arrayed waveguide grating,AWG)和电光(electro-optic,EO)可调谐/可编程光子器件等.针对PIC器件和光刻系统的大规模生产,本文介绍了一种超高速高分辨率激光光刻制造系统,采用高重复频率飞秒激光器和高速多边形激光扫描仪,可实现2.0 nm分辨率下4.8 cm2.h的光刻制造效率,并且展示了基于TFLN光子器件的晶圆级制造、晶圆级微电极结构等的应用.

关键词：薄膜铌酸锂光子集成电路光刻飞秒激光微加工

Multi-functional photonic spin Hall effect sensor controlled by phase transition

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Chinese physics B 2024年第7期33卷 336-342页

作者：程杰李瑞昭程骋张亚林刘胜利董鹏 school of Science Jiangsu Province Engineering Research Center of Low Dimensional Physics and New EnergyNanjing University of Posts and TelecommunicationsNanjing 210023China College of electronic and Optical engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China school of Electrical engineering Research Center of Intelligent Sensor and Network Engineering Technology of Jiangsu ProvinceNanjing Vocational University of Industry TechnologyNanjing 210023China

Photonic spin Hall effect(PSHE), as a novel physical effect in light–matter interaction, provides an effective metrological method for characterizing the tiny variation in refractive index(RI). In this work, we propose a multi-functional PSHE sensor based on VO_(2., a material that can reveal the phase transition behavior. By applying thermal control, the mutual transformation into different phase states of VO_(2. can be realized, which contributes to the flexible switching between multiple RI sensing tasks. When VO_(2. is insulating, the ultrasensitive detection of glucose concentrations in human blood is achieved. When VO_(2. is in a mixed phase, the structure can be designed to distinguish between the normal cells and cancer cells through no-label and real-time monitoring. When VO_(2. is metallic, the proposed PSHE sensor can act as an RI indicator for gas analytes. Compared with other multi-functional sensing devices with the complex structures, our design consists of only one analyte and two VO_(2. layers, which is very simple and elegant. Therefore, the proposed VO_(2.-based PSHE sensor has outstanding advantages such as small size, high sensitivity, no-label, and real-time detection, providing a new approach for investigating tunable multi-functional sensors.

关键词： photonic spin Hall effect multi-functional sensors phase transition sensing performance

Interface-directed epitaxially growing nickle ensembles as efficient catalysts in dry reforming of methane

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Journal of Energy Chemistry 2022年第3期31卷 502-513,I0014页

作者： Ping wang Song Wei Shiyi wang Ronghe {2. Xiao{2.g Mou Yunjie Ding Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina school of Chemical engineering and Light Industry Guangdong University of Technology.Guangzhou 510006GuangdongChina Analysis and Test Center Guangdong University of TechnologyGuangzhou 510006GuangdongChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina The State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Supported nickel catalysts are promising candidates for dry reforming of methane, but agglomeration of Ni^(0) and coke deposition hinder the industrial applications. Herein, we report a novel interface-directed synthetic approach to construct distinct metal ensembles by carefully tuning the compositions of the carriers. A Zr-Mn-Zn ternary oxide-supported Ni catalyst, together with the respective binary oxide-supported analogues, was synthesized by adopting a sequential co-precipitation and wetness impregnation method. Combined characterization techniques identify distinct catalyst models, including (i) conventional NiO nanoparticles with different sizes on Zr-Mn and Zr-Zn, and (ii) epitaxially growing NiO ensembles of a few nanometers thickness at the periphery of ZnO_(x) particles. These catalysts exhibit divergent responses in the catalytic testing, with the ternary oxide system significantly outperforming the binary analogues. The strong electronic interactions between Mn-Ni increase Ni dispersion and the activity while the stability is strengthened upon Zn addition. Both high activity, high selectivity, and remarkable stability are attained upon co-adding Mn and Zn. The interfaces between Ni and Zr-Mn-Zn rather than the physical contacts of individual oxide-supported analogues through mechanical mixing are keys for the outstanding performance.

关键词： Methane dry reforming Nickel Interface Epitaxial growth Structure-performance relationship

Cyclotron dynamics of a Bose—Einstein condensate in a quadruple-well potential with synthetic gauge fields

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Frontiers of physics 2021年第5期16卷 11-19页

作者： Wen-Yuan wang Ji lin Jie Liu Beijing Computational Science Research Center Beijing100193China Key Laboratory of Atomic and Molecular physics&Functional Materials of Gansu Province College of Physics and Electronic EngineeringNorthwest Normal UniversityLanzhou730070China Department of physics Zhejiang Normal UniversityJinhua321004China Graduate school of china Academy of {2. physics Beijing100193China HEDPS Center for Applied Physics and Technologyand College of EngineeringPeking UniversityBeijing100871China

We investigate the cyclotron dynamics of Bose-Einstein condensate(BEC)in a quadruple-well potential with synthetic gauge *** use laser-assisted tunneling to generate large tunable effective magnetic fields for *** mean position of BEC follows an orbit that simulated the cyclotron orbits of charged particles in a magnetic *** the absence of atomic interaction,atom dynamics may exhibit periodic or quasi-periodic cyclotron *** the presence of atomic interaction,the system may exhibit self-trapping,which depends on synthetic gauge fields and atomic interaction *** particular,the competition between synthetic gauge fields and atomic interaction leads to the generation of several discontinuous parameter windows for the transition to self-trapping,which is obviously different from that without synthetic gauge fields.

关键词： cyclotron dynamics Bose-Einstein condensate quadruple-well potential synthetic gauge fields

Enhancing solid-state lithium metal battery performance via indium-based modification of electrolytes and lithium metal surfaces: mechanistic insights and optimization

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Science china Chemistry 2024年

作者： Zhongkai Wu Chen Liu Ziling Jiang lin Li Siwu Li Chaochao Wei Qiyue Luo Xia Chen Long Zhang Shijie Cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and Technology school of Chemistry and Chemical engineering Huazhong University of Science and Technology Interdisciplinary Research Center of Smart Sensors Academy of Advanced Interdisciplinary Research Xidian University College of physics and Energy Fujian Normal University

Argyrodite-based solid-state lithium metal batteries exhibit significant potential as next-generation energy storage ***,their practical applications are constrained by the intrinsic poor stability of argyrodite towards Li metal and exposure to air/***,an indium-involved modification strategy is employed to address these *** optimized doping yields a high Li-ion conductivity of 7.5 mS cm-1for Li5.54In0.02.S4.47O0.03Cl1.5electrolyte,accompanied by enhanced endurance against air/moisture and bare Li *** retains 92.0%of its original conductivity after exposure to air at a low dew point of-60°C in dry ***,a composite layer comprising Li–In alloy and LiF phases is generated on the surface of lithium metal anode via the reaction between In F3and molten *** layer effectively mitigates Li dendrite growth by creating a physical barrier from the robust LiF phase,while the Li–In alloy induces uniform Li-ion deposition and accelerates Li transport dynamics across the interphase between the solid electrolyte/Li ***,the In-doped electrolyte facilitates the in-situ generation of Li–In alloy within its voids,reducing local current density and further inhibiting lithium dendrite ***,the combination of the Li5.54In0.02.S4.47O0.03Cl1.5electrolyte and the InF3@Li anode provides exceptional electrochemical performances in both symmetric cells and solid-state lithium metal batteries across different operating ***,the linbO3@lini0.7Co0.2.n0.1O2.Li5.54In0.02.S4.47O0.03Cl1.5/InF3@Li cell delivers a high discharge capacity of 167.8 mAh g-1at 0.5 C under 2.°C and retains 80.0%of its initial value after 400 *** work offers a viable strategy for designing functional interfaces with enhanced stability for sulfide-based solid-state lithium batteries.

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Dirac和Majorana费米子在空间平坦FRW时空背景下挠率场中的散射

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华东师范大学学报（自然科学版） 2024年第3期 1-11页

作者：林威薛迅华东师范大学物理与电子科学学院上海200241 华东师范大学重庆研究院重庆401120 新疆大学理论物理中心乌鲁木齐830046

讨论了在空间平坦FRW(Friedmann-Robertson-Walker)时空背景下,通过有质量宇宙学中微子能量分布的移动检验由大尺度Lorentz破缺产生的宇宙学挠率存在的可能性.在空间平坦FRW时空背景下,有质量的宇宙学中,微子在宇宙学挠率场中的散射会... 详细信息

讨论了在空间平坦FRW(Friedmann-Robertson-Walker)时空背景下,通过有质量宇宙学中微子能量分布的移动检验由大尺度Lorentz破缺产生的宇宙学挠率存在的可能性.在空间平坦FRW时空背景下,有质量的宇宙学中,微子在宇宙学挠率场中的散射会导致其末态能量分布的峰值位置相比于无挠情况时有一个m^(2./E^(2.量级的移动;并且,在非最小矢量挠率耦合的情况下,对于Dirac中微子和Majoran中微子移动的数值由于矢量挠率的影响而不同.

关键词：宇宙学挠率检验中微子膨胀宇宙

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联合图随机游走和跳跃连接的动态超图神经网络

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计算机应用与软件 2024年第3期41卷 182-187页

作者：牛雪琼农丽萍梁海王俊义林基明桂林电子科技大学信息与通信学院广西桂林541004 西安电子科技大学通信工程学院陕西西安710071 广西师范大学物理科学与技术学院广西桂林541004 桂林电子科技大学计算机与信息安全学院广西桂林541004

针对传统超图神经网络难以提取节点直接邻域外关联度高的节点特征,导致全局特征信息不完整的问题,对动态超图神经网络(DHGNN)进行改进,提出联合图随机游走和跳跃连接的动态超图神经网络(RWS-DHGNN),用于非欧几里得数据的分类。该网络在D... 详细信息

针对传统超图神经网络难以提取节点直接邻域外关联度高的节点特征,导致全局特征信息不完整的问题,对动态超图神经网络(DHGNN)进行改进,提出联合图随机游走和跳跃连接的动态超图神经网络(RWS-DHGNN),用于非欧几里得数据的分类。该网络在DHGNN的基础上,引入了图随机游走,从而有效地获取直接邻域外关联度高的节点特征。同时,引入残差网络的思想在超图的顶点卷积处增加跳跃连接构成残差结构。所提网络模型充分发挥图结构和超图结构的优势。在Cora数据集的标准分割和随机分割上将所提网络与GCN、HGNN、GAT和DHGNN进行对比实验,实验结果表明,该模型可以有效提高分类准确率。

关键词：超图神经网络随机游走跳跃连接节点分类

Studies on the Equatorial Spot of G-type Contact Binary UV Lyn

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Research in Astronomy and Astrophysics 2022年第2期22卷 53-61页

作者： Jing-Jing wang Bin Zhang lin-Qiao Jiang china University of Petroleum–Beijing at Karamay Anding Road 355834000 KaramayChina school of physics and {2. Science Guizhou Normal University550025 GuiyangChina school of physics and {2. engineering Sichuan University of Science Engineering643000 ZigongChina

New CCD photometric observations of G-type contact binary UV Lyn were obtained in 2.06 and 2.2.,when the light curves(LCs)showed positive O'Connell effect and negative O'Connell effect,*** the previous studies,the LCs by other ground-based telescope are variable from 1973 to 2.2.,particularly the magnitude difference between the two *** phenomena indicate that the component has been active in the past 47 *** addition,during monitoring by the space telescope Transiting Exoplanet Survey Satellite(TESS)from January to March 2.2.,we fortunately found continuous variations from the O'Connell effect in every cycle for the first *** analysis also shows that in a short time,the positive O'Connell effect has been transformed into the negative one,which demonstrates that there are stronger magnetic activities on the surface of the *** using the Wilson-Devinney code with a spot model,these photometric solutions confirm UV Lyn is a shallow W-subtype contact binary with a cool equatorial spot on the less massive *** successive variability of the O'Connell effect possibly results from one equatorial cool spot shifting gradually along with *** also investigated its O-C curve from these continuous LCs,and there is no apparent variation in such a short ***,regarding the O'Connell effect as the indicator of magnetic activity indicates the system is possibly undergoing a periodic trend with a period of nearly 38 *** with the trend of the O-C curve,we could not find any relation between the period variation and magnetic activity.

关键词： (stars:)binaries(including multiple):close stars:solar-type stars:magnetic field