Experimental Verification of 3D Plasmonic Cloaking in Free-Space
  We report the experimental verification of metamaterial cloaking for a 3D object in free space. We apply the plasmonic cloaking technique, based on scattering cancellation, to suppress microwave scattering from a finite-length dielectric cylinder. We verify that scattering suppression is obtained all around the object in the near- and far-field and for different incidence angles, validating our measurements with analytical results and full-wave simulations. Our near-field and far-field measurements confirm that realistic and robust plasmonic metamaterial cloaks may be realized for elongated 3D objects with moderate transverse cross-section at microwave frequencies. 
David Rainwater, Aaron Kerkhoff, Kevin Melin, Jason Soric, Gabriel   Moreno, Andrea Alu
cond-mat.mtrl-sci physics.class-ph