Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 12, Pages 4265-4269Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2cp43128a
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [19049015, 20750020]
- Japan Society for the Promotion of Science [22225002, 24350014]
- Nanotechnology Network of the MEXT, Japan
- Seki Memorial foundation for science
- Waseda University Grant [2010A-502]
- Grants-in-Aid for Scientific Research [22225002, 20750020] Funding Source: KAKEN
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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.
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