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Proceedings Paper

Distance, shape, and arrangement pattern dependence of the extinction spectra for hole arrays in a silver film
Author(s): Haining Wang; Shengli Zou
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Paper Abstract

The extinction spectra of hole arrays in a silver film are investigated with discrete dipole approximation method. The influences of distances between holes to the extinction spectra are explored; the effects of shapes and sizes of holes on the extinction spectra are also probed. For holes of the same areas, simulations show that the holes with square and rectangular shapes exhibit more efficient couplings compared with the circular ones. The increased aspect ratios (length/width) of rectangular holes perpendicular to the polarization direction strengthen their couplings. The influences of hole distances to the extinction spectra are examined. In the simulations, the lattice areas of hole arrays are first kept to be a constant (400×400 nm2), and then allowed to be changed with one fixed edge length of the rectangular lattice arrays. The calculations indicate that the extinction resonance wavelengths are more sensitive to the hole spacings along the polarization direction. The distance variations perpendicular to the polarization direction only alter the strengths of the coupling between holes and show little impact to the resonance wavelengths.

Paper Details

Date Published: 28 September 2007
PDF: 8 pages
Proc. SPIE 6642, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications III, 66420R (28 September 2007); doi: 10.1117/12.730283
Show Author Affiliations
Haining Wang, Univ. of Central Florida (United States)
Shengli Zou, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 6642:
Plasmonics: Nanoimaging, Nanofabrication, and Their Applications III
Satoshi Kawata; Vladimir M. Shalaev; Din-Ping Tsai, Editor(s)

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