Observation of DNA fixed on a sapphire substrate by a collection mode near-field optical microscope

Uma Maheswari Rajagopalan, Shuji Mononobe, Kenji Yoshida, Mamoru Yoshimoto, Motoichi Ohtsu

研究成果: Conference article査読

抄録

We present the observation results of a single string DNA (deoxy ribo nucleic acid) obtained by collection mode near-field optical microscope (NOM) operated under constant distance mode with the optical near field intensity as the feedback signal. The observed width of the narrowest string is 4 nm. To our knowledge, this is not only the successful optical observation of a single string DNA by purely optical means but also under such high resolving capability. These are attributed to the special care taken during the sample preparation to avoid unwanted scattered light and to the probe which were specially designed to enhance the local near field interaction. All these factors make the probe picks up efficiently the high spatial frequency components of the scattered near field at the same time rejecting effectively the lower spatial frequency components.

本文言語English
ページ(範囲)446-451
ページ数6
ジャーナルProceedings of SPIE - The International Society for Optical Engineering
3729
出版ステータスPublished - 1999
外部発表はい
イベントProceedings of the 1998 International Conference on Optics and Optoelectronics - Silver Jubilee Symposium of the Optical Society of India - Dehradum, India
継続期間: 1998 12 91998 12 12

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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