Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3683534
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Funding
- Singapore National Research Foundation under CRP [NRF-CRP 4-2008-06]
- National Research Foundation of Korea (NRF) [2011-0006268]
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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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