Observation of coupled-cavity structures in metamaterials

Caglayan, Humeyra; Bulu, Irfan; Loncar, Marko; Ozbay, Ekmel
September 2008
Applied Physics Letters;9/22/2008, Vol. 93 Issue 12, p121910
Academic Journal
In this letter, we investigated the transmission properties of metamaterial based coupled-cavity structures. We first calculated the effective parameters of a split-ring resonator (SRR) and composite metamaterial (CMM) structures. Subsequently, we introduced coupled-cavity structures and presented the transmission spectrum of SRR and CMM based coupled-cavity structures. The splitting of eigenmodes was observed due to the interaction between the localized electromagnetic cavity modes. Finally, the dispersion relation and normalized group velocity of the coupled-cavity structures were calculated. The maximum group velocity was found to be 100 times smaller than the speed of light in vacuum.


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