Experimental Verification of the Quantized Conductance of Photonic   Crystal Waveguides
  We report experiments that demonstrate the quantization of the conductance of photonic crystal waveguides. To obtain a diffusive wave, we have added all the transmitted channels for all the incident angles. The conductance steps have equal height and a width of one half the wavelength used. Detailed numerical results agree very well with the novel experimental results. 
Weitao Dai, Bingnan Wang, Thomas Koschny, Costas M. Soukoulis