Observation of the plasmon mode transition from triangular to hexagonal nanoplates

Keisuke Imaeda, Seiju Hasegawa, Kohei Imura*

*この研究の対応する著者

研究成果: Article査読

抄録

The geometrical shape of a metal nanostructure plays an essential role in determining the optical functionality of plasmonic cavity modes. Here, we investigate the geometrical modification effect on plasmonic cavity modes induced in two-dimensional gold nanoplates. We perform near-field transmission measurements on triangular and tip-truncated triangular nanoplates and reveal that the plasmonic cavity modes are qualitatively consistent with each other as long as the snipping size is not significant. To elucidate the tip-truncation effect on plasmonic cavity modes in detail, we carry out numerical simulations for nanoplates with various snipping sizes and find that tip truncation affects not only the optical selection rules but also the energy relation for the plasmonic cavity modes. These findings provide a foundation for the rational design of plasmonic cavities with desired optical functionality.

本文言語English
論文番号0078371
ジャーナルJournal of Chemical Physics
156
4
DOI
出版ステータスPublished - 2022 1月 28

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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