Photonic bandgap plasmonic waveguides
  A novel type of a plasmonic waveguide has been proposed featuring an "open" design that is easy to manufacture, simple to excite and that offers a convenient access to a plasmonic mode. Optical properties of photonic bandgap (PBG) plasmonic waveguides are investigated experimentally by leakage radiation microscopy and numerically using the finite element method confirming photonic bandgap guidance in a broad spectral range. Propagation and localization characteristics of a PBG plasmonic waveguide have been discussed as a function of the wavelength of operation, waveguide core size and the number of ridges in the periodic reflector for fundamental and higher order plasmonic modes of the waveguide. 
Andrey Markov, Carsten Reinhardt, Bora Ung, Andrey B. Evlyukhin, Wei   Cheng, Boris N. Chichkov and Maksim Skorobogatiy
physics.optics