Anomalous light transmission from plasmonic-capped nanoapertures

Kohei Imura, Kosei Ueno, Hiroaki Misawa, Hiromi Okamoto*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


We report an anomalous light transmission phenomenon for a nanoaperture on an opaque screen when the aperture is covered with an opaque cap. In conventional optics, light transmission must decrease when the aperture is capped. However, we found that light transmission is enhanced when the nanodisk is in close proximity to the aperture at a wavelength close to the plasmon resonance. This effect even occurs when the disk is larger than the aperture.

Original languageEnglish
Pages (from-to)960-965
Number of pages6
JournalNano Letters
Issue number3
Publication statusPublished - 2011 Mar 9


  • Plasmonic nanostructure
  • enhanced light transmission
  • nanoaperture
  • nanodisk
  • scanning near-field optical microscope

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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