Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3562372
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We propose polarization and angle insensitive metamaterials at terahertz frequencies consisting of two concentric ring resonators with interdigitated fingers placed between the rings. We experimentally demonstrate that the bandstop resonance remains unaffected by changes in both the incident angle and the polarization. Furthermore, high quality-factors of more than 16 are observed as Fano-like modes with small dipole moments are excited. We show that the sharpness of the resonance can be controlled by the number of interdigitated finger pairs. The structures exhibit pronounced normal phase dispersion near the resonance, which renders them attractive candidates for electromagnetic induced transparency and slow light applications. (C) 2011 American Institute of Physics. [doi:10.1063/1.3562372]
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