title: Frequency-Independent Response of Self-Complementary Checkerboard Screens.
abstract: This research resolves a long-standing problem on the electromagnetic response of self-complementary metallic screens with checkerboardlike geometry. Although Babinet's principle implies that they show a frequency-independent response, this unusual characteristic has not been observed yet due to the singularities of the metallic point contacts in the checkerboard geometry. We overcome this difficulty by replacing the point contacts with resistive sheets. The proposed structure is prepared and characterized by terahertz time-domain spectroscopy. It is experimentally confirmed that the resistive checkerboard structures exhibit a flat transmission spectrum over 0.1-1.1 THz. It is also demonstrated that self-complementarity can eliminate even the frequency-dependent transmission characteristics of resonant metamaterials.
authors.affiliation: Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Urade
authors.affiliation: Center for Energy and Environmental Science, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Nakata
authors.affiliation: Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nakanishi
authors.affiliation: Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: Masao
authors.initials: M
authors.lastname: Kitano