TITLE

Plasmon hybridization in nanorod dimers

AUTHOR(S)
Willingham, B.; Brandl, D. W.; Nordlander, P.
PUB. DATE
October 2008
SOURCE
Applied Physics B: Lasers & Optics;Oct2008, Vol. 93 Issue 1, p209
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Using the plasmon hybridization method we investigate the plasmon modes of nanorod dimers in axial and parallel orientations. We show that the plasmon modes of the system can be viewed as bonding and anti-bonding modes resulting from the hybridization of the plasmon modes of the individual nanorods. The dimer plasmon modes are found to depend sensitively on separation between the nanorods and on their relative spatial orientation. The calculated optical properties agree quantitatively with results from the numerical finite-difference time-domain method. The electric field enhancements are found to depend strongly on aspect ratio defined as the ratio of the major and minor radii, and on the relative orientation of the nanorods. For a nanorod dimer of fixed overall length, the maximum field enhancements are lower than those induced in a solid sphere dimer.
ACCESSION #
34338939

 

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