Abstract
Utilizing a series of micro-fabrication processes for terahertz meta materials, we fabricated three geometries of split-ring resonators: a circular geometry and two elliptical geometries. The samples were measured by the transmission spectroscopy in the terahertz time domain. Comparing these spectra, we found that these plots clearly reveal the lower frequency LC resonances and the higher frequency dipole resonances, meanwhile, the coupling of the LC and dipole resonance has an important influence on the overall response. It is shown that we can design the LC and dipole resonance frequency, and regulate the coupling of the LC and dipole resonance to adjust the overall response. A simple transmission-line RLC circuit model is used to help us understand this coupling behavior and the extent of its effects.
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