Patent ID: 8509578

Claim:
A method for carrying out electromagnetic cloaking comprising a step of using a tapered plasmonic waveguide to achieve broadband, two-dimensional electromagnetic cloaking in a visible frequency range by adiabatically varying a gap d of said tapered waveguide, wherein said tapered waveguide guides light within space defined by two surfaces that contact each other at a point and have the gap d therebetween described by the following equation d = m ⁢ ⁢ π ⁢ ⁢ r 3 / 2 ( 1 - b mL r ) L ( 2 ⁢ b mL ( 1 - b mL r ) ) 1 / 2 , wherein r is a radial distance from the point of contact, b mL is a cloak radius, and m and L are mode numbers corresponding to a waveguide mode.