IMR OpenIR
Effects of edge on graphene plasmons as revealed by infrared nanoimaging
Xu, Qingyang; Ma, Teng; Danesh, Mohammad; Shivananju, Bannur Nanjunda; Gan, Sheng; Song, Jingchao; Qiu, Cheng-Wei; Cheng, Hui-Ming; Ren, Wencai; Bao, Qiaoliang; Bao, QL (reprint author), Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, 199 Ren Ai Rd, Suzhou 215123, Jiangsu, Peoples R China.; Ren, WC (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.; Bao, QL (reprint author), Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia.
2017-02-01
发表期刊LIGHT-SCIENCE & APPLICATIONS
ISSN2047-7538
卷号6页码:-
摘要We used scattering-type scanning near-field optical microscopy (s-SNOM) to investigate the plasmonic properties of edges in well-defined graphene nanostructures, including sharp tapers, nanoribbons and nanogaps, which were all fabricated via the growth-etching chemical vapor deposition (GECVD) method. The obtained near-field images revealed the localized plasmon modes along the graphene nanoribbon; these modes strongly depended on the size of the graphene pattern, the angle of the tapered graphene and the infrared excitation wavelength. These interesting plasmon modes were verified by numerical simulations and explained by the reflection, and interference of electromagnetic waves at the graphene-SiO2 edge. The constructive interference at the graphene nanogap caused by charge accumulation was demonstrated for the first time. Using the infrared nanoimaging technique, greater plasmon broadening was observed in the zigzag edge than in the armchair edge. Our study suggests that graphene edges should be separated by an effective working distance to avoid the overlapping of localized plasmon modes, which is very important for the design of graphene-based plasmonic circuits and devices.; We used scattering-type scanning near-field optical microscopy (s-SNOM) to investigate the plasmonic properties of edges in well-defined graphene nanostructures, including sharp tapers, nanoribbons and nanogaps, which were all fabricated via the growth-etching chemical vapor deposition (GECVD) method. The obtained near-field images revealed the localized plasmon modes along the graphene nanoribbon; these modes strongly depended on the size of the graphene pattern, the angle of the tapered graphene and the infrared excitation wavelength. These interesting plasmon modes were verified by numerical simulations and explained by the reflection, and interference of electromagnetic waves at the graphene-SiO2 edge. The constructive interference at the graphene nanogap caused by charge accumulation was demonstrated for the first time. Using the infrared nanoimaging technique, greater plasmon broadening was observed in the zigzag edge than in the armchair edge. Our study suggests that graphene edges should be separated by an effective working distance to avoid the overlapping of localized plasmon modes, which is very important for the design of graphene-based plasmonic circuits and devices.
部门归属[xu, qingyang ; shivananju, bannur nanjunda ; gan, sheng ; bao, qiaoliang] soochow univ, inst funct nano & soft mat funsom, jiangsu key lab carbon based funct mat & devices, 199 ren ai rd, suzhou 215123, jiangsu, peoples r china ; [ma, teng ; cheng, hui-ming ; ren, wencai] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [danesh, mohammad ; qiu, cheng-wei] natl univ singapore, dept elect & comp engn, 4 engn dr 3, singapore 117583, singapore ; [song, jingchao ; bao, qiaoliang] monash univ, dept mat sci & engn, clayton, vic 3800, australia
关键词Edge Chirality Graphene Graphene Plasmon Nanoribbon Nanogap Near-field Microscopy S-snom
学科领域Optics
资助者National Key Research & Development Program [2015CB932700, 2016YFA0201902]; National Natural Science Foundation of China [51290273, 91433107, 51325205, 51521091]; Doctoral Fund of the Ministry of Education of China [20123201120026]; ARC [DP140101501, FT150100450]; Collaborative Innovation Center of Suzhou Nano Science Technology; Priority Academic Program Development of Jiangsu Higher Education Institutions; A*STAR Pharos Programme [152 70 00014, R-263-000-B91-305]; Competitive Research Program (CRP Award) by the National Research Foundation, Prime Minister's Office, Singapore [NRF-CRP15-2015-03]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78317
专题中国科学院金属研究所
通讯作者Bao, QL (reprint author), Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, 199 Ren Ai Rd, Suzhou 215123, Jiangsu, Peoples R China.; Ren, WC (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.; Bao, QL (reprint author), Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia.
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GB/T 7714
Xu, Qingyang,Ma, Teng,Danesh, Mohammad,et al. Effects of edge on graphene plasmons as revealed by infrared nanoimaging[J]. LIGHT-SCIENCE & APPLICATIONS,2017,6:-.
APA Xu, Qingyang.,Ma, Teng.,Danesh, Mohammad.,Shivananju, Bannur Nanjunda.,Gan, Sheng.,...&Bao, QL .(2017).Effects of edge on graphene plasmons as revealed by infrared nanoimaging.LIGHT-SCIENCE & APPLICATIONS,6,-.
MLA Xu, Qingyang,et al."Effects of edge on graphene plasmons as revealed by infrared nanoimaging".LIGHT-SCIENCE & APPLICATIONS 6(2017):-.
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