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Title: Geometrical parameters effects on local electric field enhancement of silver-dielectric-silver multilayer nanoshell

Abstract

The local electric field enhancement at different points of silver-dielectric-silver nanoshell is investigated using quasi-static theory. Because of the symmetric and anti-symmetric coupling between surface plasmon of inner silver core and outer silver shell, the local electric field spectrum of silver-dielectric-silver has two distinct peaks at resonance wavelengths. The silver core size and middle dielectric thickness affect the local electric field enhancement at different points of silver-dielectric-silver nanoshell. Increasing the silver core radius always leads to blue shift of shorter resonance wavelength and red shift of longer resonance wavelength. We observed two distinct local electric field peaks, which are corresponded to the symmetric and anti-symmetric coupling between inner and outer surface plasmons. In a system with thick silver shell, local electric field enhancement is greater than a system with thin silver shell. However, the local electric field variations as a function of silver core radius in both systems are different at different points of nanoshell. The effects of the dielectric thickness variations on local electric field are different from those from silver core size variations. As the dielectric thickness is about 3 nm, the highest local electric field enhancement occurs at the surface of the inner silver core, where themore » symmetric and anti-symmetric modes are mixed together.« less

Authors:
;  [1]
  1. Department of Physics, Razi University, Kermanshah 67144-15111 (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22218596
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; COUPLING; DIELECTRIC MATERIALS; ELECTRIC FIELDS; LAYERS; NANOSTRUCTURES; PLASMONS; RED SHIFT; RESONANCE; SILVER; SPECTRAL SHIFT; SURFACES; SYMMETRY; THICKNESS; VARIATIONS

Citation Formats

Shirzaditabar, Farzad, and Saliminasab, Maryam. Geometrical parameters effects on local electric field enhancement of silver-dielectric-silver multilayer nanoshell. United States: N. p., 2013. Web. doi:10.1063/1.4804345.
Shirzaditabar, Farzad, & Saliminasab, Maryam. Geometrical parameters effects on local electric field enhancement of silver-dielectric-silver multilayer nanoshell. United States. https://doi.org/10.1063/1.4804345
Shirzaditabar, Farzad, and Saliminasab, Maryam. 2013. "Geometrical parameters effects on local electric field enhancement of silver-dielectric-silver multilayer nanoshell". United States. https://doi.org/10.1063/1.4804345.
@article{osti_22218596,
title = {Geometrical parameters effects on local electric field enhancement of silver-dielectric-silver multilayer nanoshell},
author = {Shirzaditabar, Farzad and Saliminasab, Maryam},
abstractNote = {The local electric field enhancement at different points of silver-dielectric-silver nanoshell is investigated using quasi-static theory. Because of the symmetric and anti-symmetric coupling between surface plasmon of inner silver core and outer silver shell, the local electric field spectrum of silver-dielectric-silver has two distinct peaks at resonance wavelengths. The silver core size and middle dielectric thickness affect the local electric field enhancement at different points of silver-dielectric-silver nanoshell. Increasing the silver core radius always leads to blue shift of shorter resonance wavelength and red shift of longer resonance wavelength. We observed two distinct local electric field peaks, which are corresponded to the symmetric and anti-symmetric coupling between inner and outer surface plasmons. In a system with thick silver shell, local electric field enhancement is greater than a system with thin silver shell. However, the local electric field variations as a function of silver core radius in both systems are different at different points of nanoshell. The effects of the dielectric thickness variations on local electric field are different from those from silver core size variations. As the dielectric thickness is about 3 nm, the highest local electric field enhancement occurs at the surface of the inner silver core, where the symmetric and anti-symmetric modes are mixed together.},
doi = {10.1063/1.4804345},
url = {https://www.osti.gov/biblio/22218596}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 20,
place = {United States},
year = {Wed May 15 00:00:00 EDT 2013},
month = {Wed May 15 00:00:00 EDT 2013}
}