Photonic crystal waveguide
Wavelength dependence of the transmission
Parameters according to R. Stoffer, H.J.W.M. Hoekstra, R.M. de Ridder, E. van Groesen, and F.P.H. van Beckum, Numerical studies of 2D photonic crystals: Waveguides, coupling between waveguides and filters, Optical and Quantum Electronics 32, 947-961 (2000); see also the references cited in that paper.