Multiband terahertz metamaterials with double split-ring resonators on flexible substrates

This paper presents a double split-ring resonators array fabricated on parylene-C substrates. We designed four structures with different angles of the outer and inner split-ring resonators to achieve tunability of the metamaterial and investigated the effect of polarization direction of terahertz waves on the transmission of metamaterials. Finite-difference time-domain (FDTD) numerical simulations were conducted to calculate the transmission spectra and the electromagnetic field as well as surface current distributions. In general, our simulation results agree with the measurements to some extent.