61 citations · 349 across the 11 of their papers we have counts for
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Broadband operation of active terahertz quarter-wave plate achieved with vanadium-dioxide-based metasurface switchable by current injection
Toshihiro Nakanishi, Yosuke Nakata, Yoshiro Urade +1
We demonstrate the broadband operation of a switchable terahertz quarter-wave plate achieved with an active metasurface employing vanadium dioxide. For this purpose, we utilize ani…
Reconfigurable terahertz quarter-wave plate for helicity switching based on Babinet inversion of anisotropic checkerboard metasurface
Yosuke Nakata, Kai Fukawa, Toshihiro Nakanishi +3
Dynamic helicity switching by utilizing metasurfaces is challenging because it requires deep modulation of polarization states. To realize such helicity switching, this paper propo…
Anisotropic Babinet-invertible metasurfaces to realize transmission-reflection switching for orthogonal polarizations of light
Yosuke Nakata, Yoshiro Urade, Kunio Okimura +4
The electromagnetic properties of an extremely thin metallic checkerboard drastically change from resonant reflection (transmission) to resonant transmission (reflection) when the…
Broadband and energy-concentrating terahertz coherent perfect absorber based on a self-complementary metasurface
Yoshiro Urade, Yosuke Nakata, Toshihiro Nakanishi +1
We demonstrate that a self-complementary checkerboard-like metasurface works as a broadband coherent perfect absorber (CPA) when symmetrically illuminated by two counter-propagatin…
Supersymmetric correspondence in spectra on a graph and its line graph: From circuit theory to spoof plasmons on metallic lattices
Yosuke Nakata, Yoshiro Urade, Toshihiro Nakanishi +3
We investigate the supersymmetry (SUSY) structures for inductor-capacitor circuit networks on a simple regular graph and its line graph. We show that their eigenspectra must coinci…
Observation of a nonradiative flat band for spoof surface plasmons in a metallic Lieb lattice
Sho Kajiwara, Yoshiro Urade, Yosuke Nakata +2
We demonstrate a nonradiative flat band for spoof surface plasmon polaritons bounded on a structured surface with Lieb lattice symmetry in the terahertz regime. First, we theoretic…
Dynamically Babinet-invertible metasurface: a capacitive-inductive reconfigurable filter for terahertz waves using vanadium-dioxide metal-insulator transition
Yoshiro Urade, Yosuke Nakata, Kunio Okimura +4
This paper proposes a reconfigurable planar metamaterial that can be switched between capacitive and inductive responses using local changes in the electrical conductivity of its c…
Frequency-Independent Response of Self-Complementary Checkerboard Screens
Yoshiro Urade, Yosuke Nakata, Toshihiro Nakanishi +1
This research resolves a long-standing problem on the electromagnetic response of self-complementary metallic screens with checkerboardlike geometry. Although Babinet's principle i…
Plane-wave scattering by self-complementary metasurfaces in terms of electromagnetic duality and Babinet's principle
Yosuke Nakata, Yoshiro Urade, Toshihiro Nakanishi +1
We investigate theoretically electromagnetic plane-wave scattering by self-complementary metasurfaces. By using Babinet's principle extended to metasurfaces with resistive elements…