Enhancing the Interaction between High-Refractive Index Nanoparticles and Gold Film Substrates Based on Oblique Incidence Excitation

Yu Lun Kuo, Shih Yi Chuang, Shiuan Yeh Chen, Kuo Ping Chen

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We investigate the coupling of dipole resonances induced in a heteromaterial system composed of a high-refractive-index nanoparticle and a highly reflective substrate. A broad scattering signal and strong electric near-field enhancement in the near-infrared region are generated by a hybrid Si nanoparticle on a gold-film system under oblique illumination. Dark-field microscopy investigations of the scattering signal measurement reveal the resonance shifts of the dipole mode of silicon nanoparticles on gold films. Further, the scattering signal is enhanced for p-polarized illumination in the near-infrared region. The results indicate that the coupling of Si nanoparticles on a gold-film system facilitates a possible application for both surface-enhanced fluorescence and surface-enhanced Raman scattering.

Original languageEnglish
Pages (from-to)613-619
Number of pages7
JournalACS Omega
Volume1
Issue number4
DOIs
Publication statusPublished - 2016 Oct 31

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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