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Theoretical Assessment of Localized Surface Plasmon Resonance Properties of Au-Interlayer-Ag Multilayered Nanoshells

Authors
  • Liu, Chao1
  • Lv, Jingwei1
  • Liu, Zhaoting1
  • Zheng, Shijie2
  • Liu, Qiang1
  • Sun, Tao3
  • Mu, Haiwei1
  • Chu, Paul K.4
  • 1 Northeast Petroleum University, School of Electronics Science, Daqing, 163318, People’s Republic of China , Daqing (China)
  • 2 Harbin Institute of Technology, School of Civil Engineering, Harbin, 150090, China , Harbin (China)
  • 3 Institute of Microelectronics, Agency for Science, Technology and Research (A*STAR), Singapore, 117685, Singapore , Singapore (Singapore)
  • 4 City University of Hong Kong, Department of Physics and Materials Science, Tat Chee Avenue, Kowloon, Hong Kong, China , Hong Kong (China)
Type
Published Article
Journal
Plasmonics
Publisher
Springer-Verlag
Publication Date
Apr 11, 2016
Volume
11
Issue
6
Pages
1589–1595
Identifiers
DOI: 10.1007/s11468-016-0214-5
Source
Springer Nature
Keywords
License
Yellow

Abstract

The localized surface plasmon resonance (LSPR) properties of Au-interlayer-Ag multilayered nanoshells are studied by discrete dipole approximation (DDA) and plasmon hybridization theory. Concentric nanoshells with the metal core and nanoshell separated by an interlayer exhibit strong coupling between the core and nanoshell plasmon resonance modes. The coupled resonance mode wavelengths show a remarkable dependence on the Au core radius, refractive index of the surrounding medium, and different kinds of interlayer materials. If the interlayer is metallic, the contribution of the Au core to LSPR is suppressed, but a semiconducting interlayer can enhance the contribution. Calculation of the electric field enhancement shows that the location of the field enhancement is specified by different resonance patterns. The Au-ITO-Ag nanoshell shows strong near-field enhancement in several regions, especially in the infrared region, which have potential applications in surface-enhanced spectroscopy.

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