Finite-difference time-domain simulations of inverted cone-shaped plasmonic nanopore structures

Rintaro Matsuda, Sou Ryuzaki, Koichi Okamoto, Yusuke Arima, Makusu Tsutsui, Masateru Taniguchi, Kaoru Tamada

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

Plasmonic nanopore structures have been expected to play a key role in next-generation nanopore devices because plasmonic-enhanced electric fields inside nanopores potentially enable the measurement of surface-enhanced Raman scattering (SERS) spectra of a single analyte passing through a nanopore. However, sufficient enhancement of the electric field inside a nanopore for SERS measurements has not been obtained. Here, we report finite-difference time-domain simulation studies of inverted cone-shaped plasmonic nanopore structures, which maximally show an ∼1000 times stronger SERS enhancement factor than that of a conventional cylindrical plasmonic nanopore structure. The enhancement was found to be achieved via nanofocusing and structural effects, causing a 1.3 and 4.7 times stronger plasmonic-enhanced electric field than that of a cylindrical structure, respectively. The present study suggests a high potential of inverted cone shapes as plasmonic nanopore structures for SERS measurement of an analyte passing through a nanopore.

本文言語英語
論文番号0010418
ジャーナルJournal of Applied Physics
127
24
DOI
出版ステータス出版済み - 6月 28 2020

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

フィンガープリント

「Finite-difference time-domain simulations of inverted cone-shaped plasmonic nanopore structures」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル