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Controlling bi-anisotropy in infrared metamaterials using three-dimensional split-ring-resonators for purely magnetic
Yuto Moritake1, Takuo Tanaka2,3,4
1Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics, Wako, 351-0198, Saitama, Japan.
Abstract:
We propose and demonstrate the strategy to control bi-anisotropic response in three-dimensional split-ring-resonators (3D-SRRs) array for purely magnetic resonance in the mid-infrared region. By using a metal-stress-driven self-folding method, inversion symmetry along a propagation axis of 3D-SRRs was controlled. The inversion symmetry of 3D-SRRs realized non-bi-anisotropic response of a magnetic resonant mode at around 10 μm in wavelength resulting in purely magnetic resonance with high transmission of 70%. Highly transparent purely magnetic artificial elements demonstrated in this study will be a key component for functional applications using artificial magnetism at the optical frequencies.
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