Left-handed band in an electromagnetic metamaterial induced by sub-wavelength multiple scattering

Simon Yves (1) , Thomas Berthelot (2, 3) , Mathias Fink (1) , Geoffroy Lerosey (1, 4) , Fabrice Lemoult (1)

1 IL - Institut Langevin - Ondes et Images (UMR7587)
2 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
3 Kelenn Technology
4 greenerwave

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

Domains: Chemical Sciences; Material chemistry; Physics [physics]; Physics [physics]; Optics [physics.optics]

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, 2019, 114 (11), pp.111101. ⟨10.1063/1.5065556⟩. ⟨cea-02107417⟩