Terahertz near-field imaging using enhanced transmission through a single subwavelength aperture

Kunihiko Ishihara, Tomofumi Ikari, Hiroaki Minamide, Jun Ichi Shikata, Keishi Ohashi, Hiroyuki Yokoyama, Hiromasa Ito

研究成果: Article査読

35 被引用数 (Scopus)

抄録

We demonstrate terahertz (THz) near-field imaging using resonantly enhanced transmission of THz-wave radiation (λ ∼ 200μm) through a bull's eye structure (a single subwavelength aperture surrounded by concentric periodic grooves in a metal plate). The bull's eye structure shows extremely large enhanced transmission, which has the advantage for a single subwavelength aperture. The spatial resolution for the bull's eye structure (with an aperture diameter d = 100 μm) is evaluated in the near-field region, and a resolution of 50 μm (corresponding to λ/4) is achieved. We obtain the THz near-field images of the subwavelength metal pattern with a spatial resolution below the diffraction limit.

本文言語English
ページ(範囲)L929-L931
ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
44
28-32
DOI
出版ステータスPublished - 2005 12 1
外部発表はい

ASJC Scopus subject areas

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

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