Split of surface plasmon resonance of gold nanoparticles on silicon substrate: A study of dielectric functions

S. Zhu, T. P. Chen, Z. H. Cen, E. S.M. Goh, Siu Fung Yu, Y. C. Liu, Y. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

The split of surface plasmon resonance of self-assembled gold nanoparticles on Si substrate is observed from the dielectric functions of the nanoparticles. The split plasmon resonances are modeled with two Lorentz oscillators: one oscillator at ∼1 eV models the polarization parallel to the substrate while the other at ∼2 eV represents the polarization perpendicular to the substrate. Both parallel and perpendicular resonances are red-shifted when the nanoparticle size increases. The red shifts in both resonances are explained by the image charge effect of the Si substrate.
Original languageEnglish
Pages (from-to)21926-21931
Number of pages6
JournalOptics Express
Volume18
Issue number21
DOIs
Publication statusPublished - 11 Oct 2010
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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