Abstract : Due to the deep sub-wavelength unit cell in metamaterials, the quasi-static approximation is usually employed to describe the propagation. By making pairs of resonators, we highlight that multiple scattering also occurs at this scale and results in the existence of a dipolar resonance, which leads to a negative index of refraction when we consider several resonators. We experimentally verify the possibility of obtaining a negative index of refraction in periodic metamaterials in two different ways, and eventually demonstrates a superlensing effect in both cases
https://hal-cea.archives-ouvertes.fr/cea-02107417
Contributor : Serge Palacin
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Submitted on : Tuesday, April 23, 2019 - 4:25:57 PM
Last modification on : Thursday, July 4, 2019 - 11:00:08 AM
Simon Yves, Thomas Berthelot, Mathias Fink, Geoffroy Lerosey, Fabrice Lemoult. Left-handed band in an electromagnetic metamaterial induced by sub-wavelength multiple scattering. Applied Physics Letters, American Institute of Physics, 2019, 114 (11), pp.111101. ⟨https://doi.org/10.1063/1.5065556⟩. ⟨10.1063/1.5065556⟩. ⟨cea-02107417⟩
