Anisotropic metamaterials emulated by tapered waveguides: application to optical cloaking

Phys Rev Lett. 2009 May 29;102(21):213901. doi: 10.1103/PhysRevLett.102.213901. Epub 2009 May 27.


We demonstrate that metamaterial devices requiring anisotropic dielectric permittivity and magnetic permeability may be emulated by specially designed tapered waveguides. This approach leads to low-loss, broadband performance. Based on this technique, we demonstrate broadband electromagnetic cloaking in the visible frequency range on a scale approximately 100 times larger than the wavelength.