Light scattering of interacting gold nanorods

Baxter McGuirt, Jerry Kielbasa, Jung Ho Park, Patrick Sisco, Junping Zhang, Eric Peterson, Catherine Murphy, Richard D. Adams, Richard Williams, David Carroll

Research output: Contribution to journalArticlepeer-review

Abstract

The optical field intensity of light scattering from nanorods of gold has been imaged at distances that are intermediate between the near-field and far-field regimes using a near-field scanning optical microscope (NSOM). For scattering from isolated nanorods the Fraunhofer diffractive behaviour is modified slightly by the dipolar nature of metal nanoantannae as would be expected at these imaging distances. However, when the nanorods are brought into close proximity, interactions between the nanorods alter the scattering behaviour substantially creating large field intensities between the structures. By sampling the field with the near-field microscope tip scanned at different heights, detailed maps of the scattering profile can be generated. The NSOM image of far-field scattered light from an isolated gold nanorod. The nanorod was imaged at a distance of roughly 8μm above the support substrate using a scanning near-field microscope operated at constant height mode.

Original languageEnglish (US)
Pages (from-to)2771-2773
Number of pages3
JournalPhysica Status Solidi (B) Basic Research
Volume246
Issue number11-12
DOIs
StatePublished - Dec 2009
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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