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Resonant excitation of planar terahertz metamaterials using attenuated total reflection is demonstrated. Experimental results reveal an anomalous increase in the resonance strength while the sample is illuminated near the edge of the metamaterial array with a finite-size terahertz beam. A re-radiation signal at the fundamental metamaterial resonance is observed on the transmission side of the total...
We demonstrate broadening of fundamental resonance by successive insertion of rings inside of a split ring resonator (SRR) in a nested fashion. With the maximum inner rings, the resonance linewidth broadens by factor of four.
Bilayer split ring resonators as a function of separation (∼λ /500) and orientation are measured. Terahertz measurements match simulations showing frequency shifting of the resonances with implications for electrically small antenna design.
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