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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 28, Number 12
BKCSDE 28(12)
December 20, 2007

Title	Nano-Optical Investigation of Enhanced Field at Gold Nanosphere-Gold Plane Junctions
Author	Sung-Hyun Ahn, Won-Hwa Park, Zee Hwan Kim*
Keywords	Surface plasmons, Surface-enhanced Raman scattering, Finite-difference time-domain method, Metal nanoparticles, Dipole-coupling
Abstract	The local field distribution around gold nanosphere-gold plane junction has been studied using the finitedifference time-domain (FDTD) electrodynamics calculation procedure. We find that both the in-plane and out-of-plane polarized excitation produce enhanced field strong enough to explain the observed SERS activities of the junctions. Comparison with a simple dipole-image dipole model shows that the enhanced field primarily originates from the multipole-image multipole interaction, which indicates that the detailed fine-structures of the nanoparticles also play a significant role in the SERS activities as well.
Page	2200 - 0
Full Text	PDF

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