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The Resonance Scattering Quantum Yield with Modulated Structure of the Dielectric-Metal Multilayer Nanoshells

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Abstract:

The resonance light scattering and scattering quantum yield (SQY) of Ag-Si-Ag multi-nanoshells (ASAMN) have been investigated in dipole approximation. The results show that the SQY at resonance wavelength of ASAMN can be enhanced to obtain an intense light scattering with high efficiency meanwhile, when the volume ratio fraction of silver to the multi-shells increases with the radius of inner silver sphere increasing or the inner radius of outer silver shell decreasing. By modulating the geometrical structure of the ASAMN, the frequency bands of the maximum SQY can be tuned in the visible and near-infrared regions. The physical mechanism has been illustrated by using the effective medium theory. It has been found that the effective dielectric constant plays an important role to affect the SQY in metal-dielectric core–shell nanostructures.

Keywords: AG-SI-AG MULTI-NANOSHELLS (ASAMN); EFFECTIVE DIELECTRIC CONSTANT; RESONANCE LIGHT SCATTERING; SCATTERING QUANTUM YIELD (SQY)

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jctn.2012.2006

Publication date: January 1, 2012

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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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