Large optical transmission through a single subwavelength hole associated with a sharp-apex grating

Tsutomu Ishi, Junichi Fujikata, Keishi Ohashi

研究成果: Article査読

23 被引用数 (Scopus)

抄録

The effect of grating shapes on optical transmission in a bull's eye structure (a single subwavelength hole surrounded by a concentric grating in a metal) is discussed. Finite-difference time-domain calculations predict that a sharp-apex shape gives as high a reflective structure to the propagating surface plasmon polaritons (SPPs) as does a rectangular shape. Fabricated samples with a sharp-apex grating actually show large optical transmission (a factor of 400 greater than that of samples with a single hole) even when the number of corrugations is three. This result indicates that a sharp-apex grating acts as an effective SPP reflector to confine the energy around the hole, resulting in high optical throughput.

本文言語English
ページ(範囲)L170-L172
ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
44
1-7
DOI
出版ステータスPublished - 2005 5 2
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)

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