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) Transmission spectra of the proposed filter with different combination models. (a) Effect of the transmission spectra when E_F is 0.3 eV. (b) Effect of the transmission spectra when the E_F was set at 0 eV. (c) Distribution of the resonant electric field with no graphene. (d) Distribution of the resonant electric field with h = 5 μm. (e) Distribution of the resonant electric field with h = 0 μm.