Fabrication of a near-field optical fiber probe with a nanometric metallized protrusion

Takuya Matsumoto, Tsutomu Ichimura, Takashi Yatsui, Motonobu Kourogi, Toshiharu Saiki, Motoichi Ohtsu

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We have developed a novel probe with a nanometric metallized protrusion extending through a subwavelength aperture to increase optical near-field excitation and collection efficiencies. The apex diameter of the fabricated metallized protrusion was 35 nm. The Intensity distribution of the optical near-field at the apex of the probe was measured by scanning another probe across the apex, and it was observed that strong optical near-field was generated at the apex of the metallized protrusion. The width of the intensity distribution was 150 nm including instrumental resolution. Probes with spherical and ellipsoidal metallized protrusion were also fabricated, by which enhancement of the optical near-field is expected due to localized plasmon excitation.

Original languageEnglish
Pages (from-to)369-373
Number of pages5
JournalOptical Review
Issue number6
Publication statusPublished - 1998 Dec
Externally publishedYes


  • Fiber probe
  • Localized plasmon
  • Metallized protrusion
  • Near field optical microscope
  • Subwavelength aperture

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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