Graphene induced tunability of the surface plasmon resonance

被引:87
作者
Niu, Jing [1 ]
Shin, Young Jun [1 ]
Lee, Youngbin [2 ]
Ahn, Jong-Hyun [2 ]
Yang, Hyunsoo [1 ]
机构
[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore
[2] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, SKKU Adv Inst Nanotechnol, Suwon 440746, Gyeonggi, South Korea
基金
新加坡国家研究基金会;
关键词
CARBON; FILMS; NANOPARTICLES;
D O I
10.1063/1.3683534
中图分类号
O59 [应用物理学];
学科分类号
摘要
Tunability of the surface plasmon resonance wavelength is demonstrated by varying the thickness of Al2O3 spacer layer inserted between the graphene and nanoparticles. By varying the spacer layer thickness from 0.3 to 1.8 nm, the resonance wavelength is shifted from 583 to 566 nm. The shift is due to a change in the electromagnetic field coupling strength between the localized surface plasmons excited in the gold nanoparticles and a single layer graphene film. In contrast, when the graphene film is absent from the system, no noticeable shift in the resonance wavelength is observed upon varying the spacer thickness. (C) 2012 American Institute of Physics. [doi:10.1063/1.3683534]
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页数:4
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