Design of plasmonic toroidal metamaterials at optical frequencies

Yao Wei Huang, Wei Ting Chen, Pin Chieh Wu, Vassili Fedotov, Vassili Savinov, You Zhe Ho, Yuan Fong Chau, Nikolay I. Zheludev, Din Ping Tsai

Research output: Contribution to journalArticlepeer-review

143 Citations (Scopus)


Toroidal multipoles are the subject of growing interest because of their unusual electromagnetic properties different from the electric and magnetic multipoles. In this paper, we present two new related classes of plasmonic metamaterial composed of purposely arranged of four U-shaped split ring resonators (SRRs) that show profound resonant toroidal responses at optical frequencies. The toroidal and magnetic responses were investigated by the finite-element simulations. A phenomenon of reversed toroidal responses at higher and lower resonant frequencies has also been reported between this two related metamaterials which results from the electric and magnetic dipoles interaction. Finally, we propose a physical model based on coupled LC circuits to quantitatively analyze the coupled system of the plasmonic toroidal metamaterials.

Original languageEnglish
Pages (from-to)1760-1768
Number of pages9
JournalOptics Express
Issue number2
Publication statusPublished - 2012 Jan 16

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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