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Issue 12, 2013
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Spatial distribution of enhanced optical fields in one-dimensional linear arrays of gold nanoparticles studied by scanning near-field optical microscopy

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Abstract

We visualized the enhanced optical field distributions in one-dimensional linear array structures of gold nanospheres by using scanning near-field optical microscopy. The characteristic field distribution depends on the chain length of the one-dimensional structures. The distribution of optical field is reproduced qualitatively by model calculations based upon finite-difference time-domain (FDTD) method. From the analysis, we have found that the characteristic distribution of the enhanced field arises from interparticle interactions, which cause propagation of the plasmon excitation in the inner part of the linear array, and trapping of it by a localized mode at the edges.

Graphical abstract: Spatial distribution of enhanced optical fields in one-dimensional linear arrays of gold nanoparticles studied by scanning near-field optical microscopy

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Article information


Submitted
07 Sep 2012
Accepted
05 Nov 2012
First published
05 Nov 2012

Phys. Chem. Chem. Phys., 2013,15, 4265-4269
Article type
Paper

Spatial distribution of enhanced optical fields in one-dimensional linear arrays of gold nanoparticles studied by scanning near-field optical microscopy

T. Shimada, K. Imura, H. Okamoto and M. Kitajima, Phys. Chem. Chem. Phys., 2013, 15, 4265
DOI: 10.1039/C2CP43128A

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