Optical neutrality: invisibility without cloaking.

  title={Optical neutrality: invisibility without cloaking.},
  author={Reed Hodges and Cleon Eugene Dean and Maxim Durach},
  journal={Optics letters},
  volume={42 4},
We show that it is possible to design an invisible wavelength-sized metal-dielectric metamaterial object without evoking cloaking. Our approach is an extension of the neutral inclusion concept by Zhou and Hu [Phys. Rev. E74, 026607 (2006)PLEEE81063-651X10.1103/PhysRevE.74.026607] to Mie scatterers. We demonstrate that an increase of metal fraction in the metamaterial leads to a transition from dielectric-like to metal-like scattering, which proceeds through invisibility or optical neutrality of… 

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