Au double nanopillars with nanogap for plasmonic sensor

Wakana Kubo, Shigenori Fujikawa

研究成果: Contribution to journalArticle査読

137 被引用数 (Scopus)

抄録

We propose a simple, precise, and wafer-scale fabrication technique for Au double nanopillar (DNP) arrays with nanogaps of several tens of nanometers. An Au DNP was simply constructed by alternately laminating thin layers of Au and polymer on a template and selectively removing the thin layers. This DNP array was expected to exhibit a specific plasmonic property induced by its narrow gap. When measuring the refractive index sensitivity (RIS), Au DNP arrays with 33 nm gaps exhibited a high RIS of 1075 nm RIU-1 and showed a higher sensor figure of merit than the alternative structures, which did not have a nanogap structure but had almost the same surface area. This indicated that the enhanced plasmon electromagnetic field induced by the nanogap structure improved sensor performance. Our fabrication technique and the optical properties of the nanogap structure will provide useful information for developing new plasmonic applications with nanogap structures.

本文言語英語
ページ(範囲)8-15
ページ数8
ジャーナルNano Letters
11
1
DOI
出版ステータス出版済み - 1 12 2011
外部発表はい

All Science Journal Classification (ASJC) codes

  • バイオエンジニアリング
  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 機械工学

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