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 |
| 巻 | 44 |
| 号 | 28-32 |
| DOI | |
| 出版ステータス | Published - 2005 12 1 |
| 外部発表 | はい |
ASJC Scopus subject areas
- 工学（全般）
- 物理学および天文学（その他）
- 物理学および天文学（全般）