Numerical study on optical properties of Ag/SiO2SiO2/Ag sandwich nanocrescents substrate

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	Numerical study on optical properties of Ag/SiO2SiO2/Ag sandwich nanocrescents substrate
	Luo, Ji; Zhuang, Xuye; Xiong, Wei; Yao, Jun
刊名	JOURNAL OF MODERN OPTICS
	2012
卷号	59 期号:15 页码:1316-1321
关键词	sandwich nanostructure local field enhancement LSPR and SERS nanosensing substrate refractive index sensitivity
英文摘要	A novel structure of a metal/dielectric/metal (Ag/SiO2SiO2/Ag) sandwich nanocrescent has been proposed and studied. We make a detailed numerical analysis on the extinction efficiency and LSPR property of the sandwich nanocrescent by using the finite difference time domain (FDTD) method. It clearly demonstrates that a comparable field enhancement can be achieved by varying the thickness of the SiO2SiO2 layer at different incident polarizations. Excited in the Y-polarization, the maximum electric field enhancement factor reaches 600 at the peak wavelength 1108.9 nm, which is six times higher than previous reported single layer nanocrescent. The refractive index sensitivity of this new sandwich nanocrescent is 375.5 nm/RIU (refractive index unit). The structure is shown to produce a high local field enhancement as well as wide plasmon resonance tunabilities. Besides, compared with adjusting the shape and size of the single layer nanocrescent structure, it is much more convenient and easier to change the thickness of the sandwich nanocrescent. Due to its excellent properties, this structure is very suitable for LSPR and SERS nanosensing substrate.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Optics
研究领域[WOS]	Optics
关键词[WOS]	ARRAYS ; HYBRIDIZATION ; RESONANCES ; FILM
收录类别	SCI
语种	英语
WOS记录号	WOS:000309116800004
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/2399]
专题	光电技术研究所_光电技术研究所被WoS收录文章
作者单位	Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Nanofabricat & Microeng, Chengdu 610209, Peoples R China
推荐引用方式 GB/T 7714	Luo, Ji,Zhuang, Xuye,Xiong, Wei,et al. Numerical study on optical properties of Ag/SiO2SiO2/Ag sandwich nanocrescents substrate[J]. JOURNAL OF MODERN OPTICS,2012,59(15):1316-1321.
APA	Luo, Ji,Zhuang, Xuye,Xiong, Wei,&Yao, Jun.(2012).Numerical study on optical properties of Ag/SiO2SiO2/Ag sandwich nanocrescents substrate.JOURNAL OF MODERN OPTICS,59(15),1316-1321.
MLA	Luo, Ji,et al."Numerical study on optical properties of Ag/SiO2SiO2/Ag sandwich nanocrescents substrate".JOURNAL OF MODERN OPTICS 59.15(2012):1316-1321.