,Guided mode resonance in planar metamaterials consisting of two ring resonators with different size

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We proposed and experimentally investigated a two-ring-resonator composed planar hybrid metamaterial (MM),in which the spectra of guided mode resonance (GMR) and Fano resonance or EIT-like response induced by coherent interaction between MM resonance and GMR can be easily controlled by the size of the two rings in the terahertz regime.Furthermore,a four-ring-resonator composed MM for polarization-insensitive GMRs was demonstrated,where GMRs of both TE and TM modes are physically attributed to the diffraction coupling by two ±45° tilting gratings.Such kind of device has great potential in ultra-sensitive label-free sensors,filters,or slow light based devices.
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