Dynamically tunable terahertz passband filter based on metamaterials integrated with a graphene middle layer

Yang MaoSheng^{1, 2, 4}, Liang LanJu^{1, 2, 3, †}, Wei DeQuan^{1, 4, ‡}, Zhang Zhang^{1, 2, 3, 4}, Yan Xin^{1, 2, 3, 4}, Wang Meng^{1, 4}, Yao JianQuan^{1, 3, 4}

(color online) (a) Transmission spectra of MGMs treated with different spacing h. (b) Transmission spectra of the unit cell structures consisting of graphene and PI substrates (GPs) with different spacing h. (c) Dependence of transmission on different ΔR values. (d) Dependence of transmission on different r values of the metal ring when the outside radius is fixed at 7 μm. (e) Effect of w on the transmission spectra of MGMs. (f) Effect of graphene temperature on the transmission spectra of MGMs.