A WIDEBAND AND DUAL-RESONANT TERAHERTZ METAMATERIAL USING A MODIFIED SRR STRUCTURE

We present the desgin, fabrication and measurment of a dual-resonant broadband terahertz (THz) matamterial based on a modifled split-ring resonator (MSRR) structure. The proposed MSRR is constructed by connecting the inner split ring with the outer split ring of adjacent cell. Transmission and re∞ection characteristics of the proposed structure are simulated using Ansoft HFSS, and the permittivities show negative values in 0.492{0.693THz and 0.727{ 0.811THz bands. The designed sample is fabricated on a gallium arsenide layer, and experiments are performed in Terahertz Time- Domain Spectroscopy. Measured transmission characteristics agree well with the simulations.