Observation of amorphous recording marks using reflection-mode near-field scanning optical microscope supported by optical interference method

Masaru Sakai, Shuji Mononobe, Keiichiro Yusu, Toshiyasu Tadokoro, Toshiharu Saiki

Research output: Contribution to journalArticle

4 Citations (Scopus)


A signal enhancing technique for a reflection-mode near-field scanning optical microscope (NSOM) is proposed. Optical interference between the signal light, from an aperture at the tip of a tapered optical fiber, and the reflected light, from a metallic coating around the aperture, enhances the signal intensity. We used a rewritable high-definition digital versatile disc (HD DVD) with dual recording layers as a sample medium, and demonstrated observation of amorphous recording marks on the semitransparent (the first) recording layer. In spite of low optical contrast between the crystal region and the amorphous region on this layer, we successfully observed recording marks with good contrast.

Original languageEnglish
Pages (from-to)6855-6858
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number9 A
Publication statusPublished - 2005 Sep 8



  • Aperture probe
  • High contrast
  • High resolution
  • Illumination-collection mode
  • Near-field scanning optical microscope
  • Optical interference
  • Recording mark
  • Rewritable HD DVD

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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