I. Khromova, P. Kužel, I. Brener, J. Reno, U-Chan Chung Seu, C. Elissalde, M. Maglione, P. Mounaix, O. Mitrofanov
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Near-field characterisation of anisotropic all-dielectric terahertz resonators
We extract the intrinsic properties of micrometre-sized anisotropic dielectric resonators through near-field time-domain terahertz spectorscopy. Narrow terahertz resonances corresponding to magnetic dipole modes in ≈ 30μm-sized mono-crystalline TiO2 spheres split due to material anisotropy. Ensembles of TiO2 resonators can form complex meta-atoms for unusual electromagnetic response in terahertz all-dielectric metamaterials.
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