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Cavity formation in split ring resonators

✍ Scribed by Humeyra Caglayan; Irfan Bulu; Marko Loncar; Ekmel Ozbay

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
568 KB
Volume
6
Category
Article
ISSN
1569-4410

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✦ Synopsis

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 SRRbased 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 SRRbased 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.

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