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Applied Physics Letters / Volume 100 / Issue 6 / PHOTONICS AND OPTOELECTRONICS

Appl. Phys. Lett. 100, 061116 (2012); http://dx.doi.org/10.1063/1.3683534 (4 pages)

Graphene induced tunability of the surface plasmon resonance

Jing Niu1, Young Jun Shin1, Youngbin Lee2, Jong-Hyun Ahn2, and Hyunsoo Yang1

1Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore
2School of Advanced Materials Science & Engineering, SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University, 300 Cheoncheon, Jangan, Suwon, Gyeonggi 440-746, South Korea

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(Received 5 September 2011; accepted 21 January 2012; published online 9 February 2012)

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.

© 2012 American Institute of Physics

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KEYWORDS, PACS, and IPC

Keywords

aluminium compounds, gold, graphene, nanoparticles, surface plasmon resonance, thin films

PACS

  • 73.20.Mf

    Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

International Patent Classification (IPC)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3683534

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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