Plasmon coupling in vertical split-ring resonator metamolecules

Pin Chieh Wu, Wei-Lun Hsu, Wei Ting Chen, Yao-Wei Huang, Chun Yen Liao, Ai Qun Liu, Nikolay I. Zheludev, Greg Sun, Din Ping Tsai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

The past decade has seen a number of interesting designs proposed and implemented to generate artificial magnetism at optical frequencies using plasmonic metamaterials, but owing to the planar configurations of typically fabricated metamolecules that make up the metamaterials, the magnetic response is mainly driven by the electric field of the incident electromagnetic wave. We recently fabricated vertical split-ring resonators (VSRRs) which behave as magnetic metamolecules sensitive to both incident electric and magnetic fields with stronger induced magnetic dipole moment upon excitation in comparison to planar SRRs. The fabrication technique enabled us to study the plasmon coupling between VSRRs that stand up side by side where the coupling strength can be precisely controlled by varying the gap in between. The resulting wide tuning range of these resonance modes offers the possibility of developing frequency selective functional devices such as sensors and filters based on plasmon coupling with high sensitivity.

Original languageEnglish
Article number9726
Number of pages5
JournalScientific reports
Volume5
DOIs
StatePublished - 5 Jun 2015

Keywords

  • MAGNETIC RESPONSE
  • INDUCED TRANSPARENCY
  • METAMATERIALS

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