Near-field optical imaging of nanoscale optical fields and plasmon waves

Hiromi Okamoto*, Kohei Imura


研究成果: Review article査読

16 被引用数 (Scopus)


Near-field optical microscopy enables spectroscopic and imaging measurements with a spatial resolution far beyond the diffraction limit of light. We show in this review that spatial structures of plasmonic wavefunctions and those of enhanced optical fields are visualized by near-field spectroscopic imaging for gold nanoparticles and their assemblies. A simple formulation for the optical observation of wavefunctions of oscillating polarization modes in nanomaterials is given. We will introduce experimental methods for near-field linear transmission and nonlinear two-photon excitation measurements. We will demonstrate that the wavefunctions of surface plasmons resonant with the incident wavelength are visualized by the near-field methods for gold nanorods. In addition, we will also show for aggregated gold nanospheres that an enhanced optical field is localized in the interstitial gaps between the particles by near-field two-photon excitation measurements.

ジャーナルJapanese journal of applied physics
7 PART 3
出版ステータスPublished - 2008 7月 18

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)


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