Conductive Coupling of Split Ring Resonators: A Path to THz Metamaterials with Ultrasharp Resonances
Research Area: THz Linear and Nonlinear Phenomena Year: 2014
Type of Publication: Article  
  • I. Al-Naib
  • E. Hebestreit
  • C. Rockstuhl
  • F. Lederer
  • D. Christodoulides
  • T. Ozaki
  • R. Morandotti
Journal: Physical Review Letters Volume: 112
Number: 18 Pages: 183903
Month: May
We report on a novel metamaterial structure that sustains extremely sharp resonances in the terahertz domain. This system involves two conductively coupled split ring resonators that together exhibit a novel resonance, in broad analogy to the antiphase mode of the so-called Huygens coupled pendulum. Even though this resonance is in principle forbidden in each individual symmetric split ring, our experiments show that this new coupled mode can sustain quality factors that are more than one order of magnitude larger than those of conventional split ring arrangements. Because of the universality of the metamaterial response, the design principle we present here can be applied across the entire electromagnetic spectrum and to various metamaterial resonators.
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