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 treated with different Fermi level energies. (a) Transmission spectra of MGMs. (b) Effect of f₀ and Δf. (c) Transmission spectra of GPs. (d) Transmission spectra of a single graphene sheet.