Plasmonic Beam Shaping in the Mid-infrared
  Simulation results, fabrication details and measurements are presented for a one dimensional aperture and grating array for the purpose of plasmonic beam shaping of the {\lambda}=3.99{\mu}m output of an optically pumped semiconductor laser. 
J. R. Pugh, J. Stokes, G.R.Nash, C. D. Stacey and M. J. Cryan
physics.optics