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湖南大學(xué)材料科學(xué)與工程學(xué)院研究生導(dǎo)師李梓維介紹如下：

李梓維,副教授、湖南大學(xué)“岳麓學(xué)者”、碩士生導(dǎo)師

研究領(lǐng)域：二維材料光物理、納米光子學(xué)、新型光電子器件

電子郵箱：ziwei_li@hnu.edu.cn
 
熱忱招收碩士、本科學(xué)生參與實驗，優(yōu)秀學(xué)生推薦保送北京大學(xué)直博！
 
基本信息

李梓維，男，理學(xué)博士，湖南大學(xué)材料科學(xué)與工程學(xué)院副教授（岳麓學(xué)者晨星B崗），碩士生導(dǎo)師

1990年出生于吉林省延邊州琿春市，2013年于吉林大學(xué)電子科學(xué)與工程學(xué)院取得工學(xué)學(xué)士學(xué)位，同年保送至北京大學(xué)前沿交叉學(xué)科研究院、物理學(xué)院攻讀理學(xué)博士學(xué)位，導(dǎo)師為優(yōu)秀青年基金、中組部青年拔尖人才項目獲得者，Prof. Zheyu Fang (方哲宇研究員)。2017年在英國伯明翰大學(xué)超材料中心訪問學(xué)習(xí)，師從超構(gòu)材料領(lǐng)域的專家，Prof. Shuang Zhang (張霜教授)。2018年6月取得北京大學(xué)凝聚態(tài)物理理學(xué)博士學(xué)位，同年7月加入湖南大學(xué)材料科學(xué)與工程學(xué)院工作。

主要研究領(lǐng)域為二維材料、納米光子學(xué)、新型光電子器件。利用穩(wěn)態(tài)、瞬態(tài)光譜探測技術(shù)和微納加工方法，制備和表征二維異質(zhì)結(jié)材料的物理、化學(xué)性質(zhì)，研究材料內(nèi)部的載流子轉(zhuǎn)換、激子動力學(xué)、谷熒光發(fā)射、表面等離激元共振等。近年來，共發(fā)表SCI論文18篇，作為第一作者及共同第一作者發(fā)表論文7篇，包括Adv. Mater. 2篇，Nano Lett. 1篇，ACS Nano 2篇，Nanoscale 1篇，Chin. Phy. B 1篇。相關(guān)工作被ACS Nano: 'In Nano'特刊、Advanced Materials "video abstract"、Wiley Materials Views China、Design for Science等國內(nèi)外科學(xué)網(wǎng)等新聞媒體多次報導(dǎo)。

博士期間科研成績突出，榮獲20項省市級、校級獎勵和榮譽，包括北京大學(xué)五四學(xué)生獎?wù)?北大學(xué)生最高榮譽)、北京大學(xué)學(xué)生年度人物（北大學(xué)生最具影響力榮譽）、北京市三好學(xué)生、北京市優(yōu)秀畢業(yè)生、博士生國家獎學(xué)金、寶鋼優(yōu)秀學(xué)生特等獎、中國航天集團CASC獎學(xué)金等等。2016年曾掛職于安徽省宿州市高新區(qū)主任助理，協(xié)助宿州市淮海石墨烯研究院搭建石墨烯創(chuàng)新基地。
 
Ziwei Li (Jervis Lee)
Associate Professor of Physics and Material Sciences, Hunan University, 2018-now;
Ph. D in Academy for Advanced Interdisceplinary Studies, Department of Physics, Peking University, 2009-2013;
Visiting Scholar in School of Physics and Astronomy, Birmingham University (UK), 2017.2-2017.8;
BS in School of Electronic Science and Engineering, Jilin University (China), 2009-2013;
 
He focuses on 2D materials, nanophotonics and novel opto-electronic devices. He majors in nanofabrication and spectroscopic technology. Using steady-state, transient spectral detection technology to investigate the light-physics of 2D materials, including charge transfer, dynamics of excitons, valley polarization and surface plasmon. He has published 18 papers in peer-reviewed journals including Advanced Materials, Nano Letters, ACS Nano, Advanced Functional Materials, Advanced Science, Laser & Photonics Reviews, Small, Nanoscale and Advanced Optical Materials. Some works have been highlighted in ACS Nano special issue "In Nano", Advanced Materials "video abstract", Wiley Materials Views China, Design for Science.
 
Selected Publications：
1、Ziwei Li, Changxu Liu, Xin Rong, Yang Luo, Haotian Cheng,  Liheng Zheng, Feng Lin, Bo Shen, Shuang Zhang*, Zheyu Fang*. Tailoring MoS₂ Valley-Polarized Photoluminescence with Super Chiral Near-Field. Advanced Materials, in press, 2018. ( IF=19.791, Web, PDF)
2、Ziwei Li†, Yu Li†, Tianyang Han, Xingli Wang, Ying Yu, Bengkang Tay, Zheng Liu, Zheyu Fang*. Tailoring MoS2 Exciton-Plasmon Interaction by Optical Spin-Orbit Coupling. ACS Nano 11, 1165-1171, 2017. ( IF=13.942, Web, PDF, ESI high cited paper <1% ) {ACS Nano:'In Nano', Design for Science}
3、Zhigang Song†, Ziwei Li†, Hong Wang, Honglin Du, Sunquan Liu, Changsheng Wang, Yingchang Yang, Zheng Liu, Jing Lu, Zheyu Fang*, Jinbo Yang*. Valley Pseudospin with a Widely Tunable Bandgap in Doped BN Monolayer. Nano Letters 17, 2079-2087, 2017. ( IF=12.712, Web, PDF)
4、Ziwei Li, Ruquan Ye, Rui Feng, Yimin Kang, Xing Zhu, James M. Tour, Zheyu Fang*. Graphene Quantum Dots Doping of MoS2 Monolayers. Advanced Materials 27, 5235-5240, 2015. ( IF=19.791, Web, PDF) {Wiley Materials Views China}
5、Ziwei Li†, Yingdong Xiao†, Yongji Gong, Zongpeng Wang, Yimin Kang, Shuai Zu, Pulickel M. Ajayan, Peter Nordlander, Zheyu Fang*. Active Light Control of the MoS2 Monolayer Exciton Binding Energy. ACS Nano 9, 10158-10164, 2015. ( IF=13.942, Web, PDF)
全部論文查看（Researchgate Website）
 
研究概況

l超構(gòu)材料中超旋電磁場調(diào)控二硫化鉬(MoS2)谷熒光發(fā)射。由納米棒結(jié)構(gòu)的周期組合和排列形成了C4對稱超材料表面，二維材料被夾在金屬層和超表面之間的電介質(zhì)層中。超構(gòu)材料在左/右旋圓偏振光激發(fā)下，呈現(xiàn)不同的近場超旋電磁場模式。由于材料激子與超旋電磁場共振耦合作用不同。左旋圓偏振光激發(fā)下，二硫化鉬的谷偏振度從25%增強到43%，右旋光圓偏振激發(fā)時，二硫化鉬的谷偏振度從25%降低到20%。該工作實現(xiàn)了手性超構(gòu)材料對二維材料谷激子熒光效率的調(diào)控作用，突破材料自身非各向異性限制，實現(xiàn)了手性的谷極化度探測。同時，弱化了谷極化熒光的激發(fā)條件，首次利用線偏振光成功觀測到谷極化熒光現(xiàn)象。（Advanced Materials, 2018, Highlight: Advanced Materials "Video Abstract"）

l利用光的自旋與軌道耦合調(diào)控激子-等離激元耦合過程。通過加工納米尺度的金屬螺旋結(jié)構(gòu)，利用光在結(jié)構(gòu)中產(chǎn)生的自旋軌道耦合的機理，可以實現(xiàn)光操控激子-等離激元耦合增強。在金屬結(jié)構(gòu)的增強作用下，左旋光激發(fā)時單層MoS2信號增強超過10倍，在右旋光激發(fā)時信號未顯著增強。系統(tǒng)研究發(fā)現(xiàn)，該耦合過程與納米結(jié)構(gòu)的尺寸參數(shù)、螺旋結(jié)構(gòu)圈數(shù)、激光的功率和激發(fā)波長密切相關(guān)。利用Majorana球模型首次分析了納米結(jié)構(gòu)中的光的自旋與軌道耦合現(xiàn)象。并利用該原理實現(xiàn)了旋光操控的發(fā)光陣列，左旋光和右旋光分別呈現(xiàn)“PKU”字母的明文和暗文發(fā)光。(ACS Nano, 2017, Highlight: ACS Nano:'In Nano', Design for Science, ESI High Cited Paper <1%)

l氮化硼材料中谷的贗自旋研究。氮化硼（BN）及碳原子摻雜氮化硼（BCN）材料體系在缺失C3對稱性的保護情況下，材料仍具有非等價的能谷和完美的谷贗自旋性質(zhì)，并且材料的帶隙可隨碳原子摻雜濃度從紫外到遠紅外大范圍可調(diào)。低濃度的摻雜下，由于人工超結(jié)構(gòu)和谷的相互作用，能帶劈裂城分裂的能級并具有非連續(xù)的谷霍爾電導(dǎo)。在高濃度摻雜下，實驗上在可見光波段觀察到由于谷極化導(dǎo)致的圓極化的光致發(fā)光現(xiàn)象，室溫下發(fā)出的圓偏振光的極化率接近40%，77k低溫時，極化率高達70%。(Nano Letters, 2017)

l石墨烯量子點/二硫化鉬復(fù)合材料的電荷轉(zhuǎn)移過程研究。石墨烯量子點 (GQDs)與單層二硫化鉬（MoS2）相互作用會在復(fù)合材料界面處發(fā)生電荷轉(zhuǎn)移過程。控制石墨烯量子點在二硫化鉬上的覆蓋密度，通過對二硫化鉬的熒光峰位和發(fā)光波長進行分析與觀測，發(fā)現(xiàn)2納米的量子點在非飽和濃度時對二硫化鉬電子摻雜更有效。 通過激子發(fā)光三能級模型，分析了材料中激子和三激子的競爭激勵，從熒光峰強度估算電子摻雜的濃度。(Advanced Materials, 2015)

l等離激元熱電子調(diào)控單層二硫化鉬的光學(xué)性質(zhì)。光激發(fā)金屬納米顆粒產(chǎn)生表面等離激元共振，在共振的衰減過程中，會產(chǎn)生大量的熱電子可以實現(xiàn)光控的電子摻雜效應(yīng)。在摻雜的過程中，單層MoS2的吸收光譜和熒光光譜都發(fā)生顯著的變化，該變化與金屬顆粒的形貌尺寸、激發(fā)光波長、強度等密切相關(guān)；Drude模型可以從光譜變化間接估算電子摻雜濃度。利用熱電子摻雜效應(yīng)，實現(xiàn)了基于二維材料的光控光器件。(ACS Nano, 2015)

學(xué)術(shù)成果
 
Publicaitons:
1、Ziwei Li, Changxu Liu, Xin Rong, Yang Luo, Haotian Cheng,  Liheng Zheng, Feng Lin, Bo Shen, Shuang Zhang*, Zheyu Fang*. Tailoring MoS₂ Valley-Polarized Photoluminescence with Super Chiral Near-Field. Advanced Materials, adma.201801908R1, 2018.
2、Ziwei Li†, Yu Li†, Tianyang Han, Xingli Wang, Ying Yu, Bengkang Tay, Zheng Liu, Zheyu Fang*. Tailoring MoS2 Exciton-Plasmon Interaction by Optical Spin-Orbit Coupling. ACS Nano 11, 1165-1171, 2017.
3、Zhigang Song†, Ziwei Li†, Hong Wang, Honglin Du, Sunquan Liu, Changsheng Wang, Yingchang Yang, Zheng Liu, Jing Lu, Zheyu Fang*, Jinbo Yang*. Valley Pseudospin with a Widely Tunable Bandgap in Doped BN Monolayer. Nano Letters 17, 2079-2087, 2017.
4、Ziwei Li, Ruquan Ye, Rui Feng, Yimin Kang, Xing Zhu, James M. Tour, Zheyu Fang*. Graphene Quantum Dots Doping of MoS2 Monolayers. Advanced Materials 27, 5235-5240, 2015.
5、Ziwei Li†, Yingdong Xiao†, Yongji Gong, Zongpeng Wang, Yimin Kang, Shuai Zu, Pulickel M. Ajayan, Peter Nordlander, Zheyu Fang*. Active Light Control of the MoS2 Monolayer Exciton Binding Energy. ACS Nano 9, 10158-10164, 2015.
6、Tianyang Han†, Shuai Zu†, Ziwei Li, Meiling Jiang, Xing Zhu, Zheyu Fang*. Reveal and Control of Chiral Cathodoluminescence at Subnanoscale. ACS Nano 18, 567-572, 2017.
7、Yumin Wang†, Ziwei Li†, Ke Zhao, Ali Sobhani, Xing Zhu, Zheyu Fang*, Naomi J. Halas*. Substrate-Mediated Charge Transfer Plasmons in Simple and Complex Nanoparticle Clusters. Nanoscale 5, 9897 (2013).
8、Yu Li, Ziwei Li, Cheng Chi, Hangyong Shan, Liheng Zheng, Zheyu Fang*. Plasmonics of 2D Nanomaterials: Properties and Applications. Advanced Science 4, 1600430, 2016.
9、Ziwei Li, Yihan Hu, Yu Li, Zheyu Fang*. Light-Matter Interaction of 2D Materials: Physics and Device Applicaitons. Chinese Physics B 26, 036802, 2017.
10、Yanjun Bao, Zhijian Hu, Ziwei Li, Xing Zhu, Zheyu Fang*. Plasmonics: Magnetic Plasmonic Fano Resonance at Optical Frequency. Small 11, 2102, 2015.
11、Ying Yu, Ziheng Ji, Shuai Zu, Bowen Du, Yimin Kang, Ziwei Li, Zhangkai Zhou, Kebin Shi, Zheyu Fang*. Ultrafast Plasmonic Hot Electron Transfer in Au Nanoantenna/MoS2 Heterostructures, Advanced Functional Materials 26, 6394-6401, 2016.
12、Bowen Du, Li Lin, Wei Liu, Shuai Zu, Ying Yu, Ziwei Li, Yimin Kang, Hailin Peng, Xing Zhu, Zheyu Fang*. Plasmonic Hot Electron Tunneling Photodetection in Vertical Au-Graphene Hybrid Nanostructure, Laser & Photonics Reviews 11, 1600148, 2017.
13、Shuai Zu, Bowen Li, Yongji Gong, Ziwei Li, Pulickel M. Ajayan, Zheyu Fang*. Active Control of Plasmon-Exciton Coupling in MoS2-Ag Hybrid Nanostructures, Advanced Optical Materials 4, 1463, 2016.
14、Zhijian Hu, Yanjun Bao, Ziwei Li, Yongji Gong, Rui Feng, Yingdong Xiao, Xiaochun Wu, Zhaohui Zhang, Xing Zhu, Pulickel M. Ajayan, Zheyu Fang*. Temperature Dependent Raman and Photoluminescence of Vertical WS2/MoS2 Monolayer Heterostructures, Science Bulletin 62, 16, 2017.
15、Yimin Kang, Yongji Gong, Zhijian Hu, Ziwei Li, Ziwei Qiu, Xing Zhu, Pulickel M Ajayan, Zheyu Fang*. Plasmonic hot electron enhanced MoS2 photocatalysis in hydrogen evolution. Nanoscale 7, 4482, 2015.
16、Tao Huang, Jiajian Wang, Ziwei Li, Wei Liu, Feng Lin, Zheyu Fang, Xing Zhu*. Spin-Controlled Directional Launching of Surface Plasmons at the Subwavelength Scale. Chinese Physics B 25, 087302, 2016.
17、Shan Huang, Jie Li, Xuewei Zhang, Yimin Kang, Ziwei Li, Feng Lin, Xing Zhu*, Plasmonic waveplate: incident polarization modulation. Applied Physics A, 115, 589, 2014.
18、Jie Li, Chaojie Yang, Jiaming Li, Ziwei Li, Shuai Zu, Siyu Song, Huabo Zhao, Feng Lin, Xing Zhu*, Plasmonic Focusing in Nanostructures. Plasmonics, 9, 879, 2014.