Pseudospectral modeling of nano-optics in Ag sphere arrays

Bang Yan Lin, Chun Hao Teng, Hung Chun Chang, Hui Hsin Hsiao, Juen Kai Wang, Yuh Lin Wang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report a Legendre pseudospectral modeling of silver sphere arrays illuminated by light waves. A special feature of the present computation is that the dispersive nature of silver is described by a Drude-Lorentz model with model parameters obtained by fitting the frequency-domain complex-valued dielectric constants measured experimentally. Numerical validations are conducted based on solving both the near and far fields of the Mie scattering problem, and we observe good convergence on the numerical fields. The far-field patterns of the Ag sphere arrays are simulated. The results are compared to those obtained by the dipole-coupling-model method, and we observe very good agreement between these results. The near-field patterns are also computed, and localized enhanced electric fields in the inter-particle gap regions due to plasmonic coupling between Ag particles are visualized. As the gap between Ag particles is reduced the strength of the localized enhanced electric field is increased.

Original languageEnglish
Pages (from-to)429-446
Number of pages18
JournalJournal of Scientific Computing
Volume45
Issue number1-3
DOIs
Publication statusPublished - Oct 2010
Externally publishedYes

Keywords

  • Ag nano-spheres
  • Plasmonic coupling
  • Pseudospectral simulation
  • Surface plasmon enhanced field

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Software
  • Engineering(all)
  • Computational Theory and Mathematics

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  • Cite this

    Lin, B. Y., Teng, C. H., Chang, H. C., Hsiao, H. H., Wang, J. K., & Wang, Y. L. (2010). Pseudospectral modeling of nano-optics in Ag sphere arrays. Journal of Scientific Computing, 45(1-3), 429-446. https://doi.org/10.1007/s10915-010-9376-z