Direct near-field optical imaging of plasmonic resonances in metal nanoparticle pairs

Hsing Ying Lin, Chen Han Huang, Chih Han Chang, Yun Chiang Lan, Hsiang Chen Chui

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

In this paper we investigate the near-field optical behavior of plasmon coupling in gold nanoparticle pairs. In particular, by performing series measurements through a fiber-collection mode near-field scanning optical microscope (NSOM), we directly observed the localized electromagnetic (EM) field distribution between two nanospheres is sensitively depended on the incident polarization and interparticle distance. The qualitative near-field observation and quantitative analysis facilitate more understanding of localized hot spots in surface-enhanced Raman scattering (SERS), and nano-applications in selectively controlling the spatial distribution of localized surface plasmon (SP) modes on a fabricated nanostructure by adjusting the polarization direction.

Original languageEnglish
Pages (from-to)165-172
Number of pages8
JournalOptics Express
Volume18
Issue number1
DOIs
Publication statusPublished - 2010 Jan 4

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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