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Numerical Study of Optical Properties of Ag/SiO2/Ag Sandwich Nanobowties

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Abstract:

A composite nanobowtie with Ag/SiO2/Ag sandwich structure is presented and its optical properties especially the Plasmon property are studied using the discrete dipole approximation (DDA) method in this paper. Our results show that this structure has simply-tunable surface Plasmon resonance (SPR) wavelengths and more "hotter spots" provided by the sandwich structure, as well as the remarkable enhancement of the localized E-field provided by the bowtie structure. The transverse and longitudinal Plasmon coupling mechanism is employed to explain tunable SPR and strong E-field enhancement respectively. The sandwich nanobowtie possesses the qualities of simplytunable SPR and great E-field enhancement, thereby holding a great potential in applications such as surface-enhanced Raman scattering (SERS).

Keywords: BOWTIE; DDA; SANDWICH; SPR

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jctn.2009.1014

Publication date: January 1, 2009

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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