Cavity formation in split ring resonators


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Caglayan H. , Bulu I., Loncar M., Ozbay E.

PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS, vol.6, pp.200-204, 2008 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 6
  • Publication Date: 2008
  • Doi Number: 10.1016/j.photonics.2008.09.001
  • Title of Journal : PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
  • Page Numbers: pp.200-204

Abstract

We report that it is possible to obtain a cavity structure by the deformation of a unit cell of an split ring resonator (SRR) structure. We presented the Q-factor of the cavity resonance as 192 for an SRR-based single cavity. Subsequently, we brought two and three cavities together with an intercavity distance of two metamaterial unit cells and investigated the transmission spectrum of SRR-based interacting 2-cavity and 3-cavity systems. The splitting of eigenmodes due to the interaction between the localized electromagnetic cavity modes was observed. Eventually, in taking full advantage of the effective medium theory, we modeled SRR-based cavities as 1D Fabry-Perot reflectors (FPRs) with a subwavelength cavity at the center. Finally, we observed that at the cavity resonance, the effective group velocity was reduced by a factor of 67 for an SRR-based single cavity compared to the electromagnetic waves propagating in free space. (C) 2008 Elsevier B.V. All rights reserved.