Anomalous Wavelength Scaling of Tightly Coupled Terahertz Metasurfaces

Ji Hun Kang, Seo Joo Lee, Bong Joo Kang, Won Tae Kim, Fabian Rotermund, Q Han Park

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We theoretically and experimentally demonstrate the drastic changes in the wavelength scaling of tightly coupled metasurfaces caused by deep subwavelength variations in the distance between the unit resonators but no change in the length scale of the units themselves. This coupling-dependent wavelength scaling is elucidated by our model metasurfaces of ring resonators arranged with deep subwavelength lattice spacing g, and we show that narrower g results in rapider changes in wavelength scaling. Also, by using terahertz time-domain spectroscopy, we experimentally observed a significant shift of the spectral response arising from very small variations in lattice spacing, confirming our theoretical predictions.

Original languageEnglish
Pages (from-to)19331-19335
Number of pages5
JournalACS Applied Materials and Interfaces
Volume10
Issue number23
DOIs
Publication statusPublished - 2018 Jun 13

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Keywords

  • metamaterials
  • metasurfaces
  • resonators
  • scaling effect
  • terahertz spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)

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