Supermodes of Hexagonal Lattice Waveguide Arrays
  We present a semi-analytical formulation for calculating the supermodes and corresponding Bloch factors of light in hexagonal lattice photonic crystal waveguide arrays. We then use this formulation to easily calculate dispersion curves and predict propagation in systems too large to calculate using standard numerical methods. 
J. Scott Brownless, Felix J. Lawrence, Sahand Mahmoodian, Kokou B.   Dossou, Lindsay C. Botten, and C. Martijn de Sterke
physics.optics