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题名:
A numerical investigation of the effect of vertex geometry on localized surface plasmon resonance of nanostructures
作者: Ma, W. Y.1; Yang, H.1; Hilton, J. P.2; Lin, Q.2; Liu, J. Y.1; Huang, L. X.1; Yao, J.1
刊名: OPTICS EXPRESS
出版日期: 2010-01-18
卷号: 18, 期号:2, 页码:843-853
文章类型: Article
英文摘要: Advances in nanofabrication and nano-scale measurement methods now allow for fabrication of highly detailed nanometer-scale topographic features. As geometric features greatly impact the formation of an electromagnetic field in response to incident light, this in turn calls for the study of the effects of new features of nanostructures on their performance in applications such as localized surface plasmon resonance (LSPR) sensing. This paper studies the effects of vertex features of a single nanostructure on its LSPR properties. A general relationship between the LSPR spectra and the vertex features of a nanoparticle is established. The results of electrodynamics calculations show that a delta-star with a relatively small vertex angle exhibits a bigger resonant wavelength than one with a large vertex angle. Moreover, the sensing performance initially increases, and then decreases as angular size of the vertices increases, with a turning point of 30 degrees. It is also shown that for nanostars with different numbers of vertices, the resonant wavelength undergoes a blue shift and the sensing performance grows poorer as the number of vertices increases. A regular vertex angle of 30 degrees displays the greatest figure of merit (FOM) value for LSPR applications, approximately 9.5 RIU-1. (C)2009 Optical Society of America
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: SINGLE SILVER NANOPARTICLES ; OPTICAL-PROPERTIES ; DIELECTRIC ENVIRONMENT ; SPECTROSCOPY ; SHAPE ; ENHANCEMENT ; SENSITIVITY ; PARTICLES ; NANOWIRES ; SPECTRA
收录类别: SCI
语种: 英语
WOS记录号: WOS:000273860400048
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3372
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Opt Technol Microfabricat, Inst Opt & Elect, Chengdu 610209, Peoples R China
2.Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

Recommended Citation:
Ma, W. Y.,Yang, H.,Hilton, J. P.,et al. A numerical investigation of the effect of vertex geometry on localized surface plasmon resonance of nanostructures[J]. OPTICS EXPRESS,2010,18(2):843-853.
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