Numerical analysis of surface plasmon resonance effects on a rotational silver nanorod/nanoshell dimer

Yuan-Fong Chou Chau

doi:10.1117/12.2021985

7 June 2013 Numerical analysis of surface plasmon resonance effects on a rotational silver nanorod/nanoshell dimer

Yuan-Fong Chou Chau

Proceedings Volume 8883, ICPS 2013: International Conference on Photonics Solutions; 88831F (2013) https://doi.org/10.1117/12.2021985
Event: International Conference on Photonics Solutions 2013, 2013, Pattaya City, Thailand

Abstract

In this work, we numerically investigate the surface plasmon resonance (SPR) effects on a pair of rotational silver nanorod/nanoshell dimer with a finite height of 1000 nm by means of finite element method with three dimensional calculation. The rotational angles of the silver nanorod/nanoshell dimer are chosen θ=0°, θ=25°, θ=45° and θ=90°, respectively. The proposed structure exhibits a red-shifted localized SPR that can tuned over an extended wavelength range by varying the dielectric constant in metal nanoshell and the rotational angle of the silver nanorod/nanoshell dimer. The tunable optical properties on SPR phenomena are attributed to the rotational effect and a larger effective size of dielectric constant that is filled with a higher refractive medium of finite height of metal nanorod/nanoshell. This unique property of a pair of rotational nanorod/nanoshell dimer is highly attractive for serving as resonant center to hold and probe smaller nanostructures, such as biomolecules or quantum dots. Such structures also show significant promise for applications in nano-switch devices, sensing, and surface-enhanced spectroscopy, due to their strong and tunable plasmon resonances.

Citation Download Citation

Yuan-Fong Chou Chau "Numerical analysis of surface plasmon resonance effects on a rotational silver nanorod/nanoshell dimer", Proc. SPIE 8883, ICPS 2013: International Conference on Photonics Solutions, 88831F (7 June 2013); https://doi.org/10.1117/12.2021985

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