Tunable Dipole Surface Plasmon Resonances of Silver Nanoparticles by Cladding Dielectric Layers

	Tunable Dipole Surface Plasmon Resonances of Silver Nanoparticles by Cladding Dielectric Layers
	Liu, X. T.; D. B. Li; X. J. Sun; Z. M. Li; H. Song; H. Jiang and Y. R. Chen
	2015
发表期刊	Scientific Reports
卷号	5 页码:7
摘要	The tunability of surface plasmon resonance can enable the highest degree of localised surface plasmon enhancement to be achieved, based on the emitting or absorbing wavelength. In this article, tunable dipole surface plasmon resonances of Ag nanoparticles (NPs) are realized by modification of the SiO2 dielectric layer thicknesses. SiO2 layers both beneath and over the Ag NPs affected the resonance wavelengths of local surface plasmons (LSPs). By adjusting the SiO2 thickness beneath the Ag NPs from 5 nm to 20 nm, the dipole surface plasmon resonances shifted from 470 nm to 410 nm. Meanwhile, after sandwiching the Ag NPs by growing SiO2 before NPs fabrication and then overcoating the NPs with various SiO2 thicknesses from 5 nm to 20 nm, the dipole surface plasmon resonances changed from 450 nm to 490 nm. The SiO2 cladding dielectric layer can tune the Ag NP surface charge, leading to a change in the effective permittivity of the surrounding medium, and thus to a blueshift or redshift of the resonance wavelength. Also, the quadrupole plasmon resonances were suppressed by the SiO2 cladding layer because the dielectric SiO2 can suppress level splitting of surface plasmon resonances caused by the Ag NP coupling effect.
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55440
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu, X. T.,D. B. Li,X. J. Sun,et al. Tunable Dipole Surface Plasmon Resonances of Silver Nanoparticles by Cladding Dielectric Layers[J]. Scientific Reports,2015,5:7.
APA	Liu, X. T.,D. B. Li,X. J. Sun,Z. M. Li,H. Song,&H. Jiang and Y. R. Chen.(2015).Tunable Dipole Surface Plasmon Resonances of Silver Nanoparticles by Cladding Dielectric Layers.Scientific Reports,5,7.
MLA	Liu, X. T.,et al."Tunable Dipole Surface Plasmon Resonances of Silver Nanoparticles by Cladding Dielectric Layers".Scientific Reports 5(2015):7.

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