title: Coupled waveguide modes in hexagonal photonic crystals.
abstract: We investigate the modes of coupled waveguides in a hexagonal photonic crystal. We find that for a substantial parameter range the coupled waveguide modes have dispersion relations exhibiting multiple intersections, which we explain both intuitively and using a rigorous tight-binding argument.
authors.affiliation: IPOS and CUDOS, School of Physics, University of Sydney, 2006, Australia. jbro@physics.usyd.edu.au
authors.forename: J Scott
authors.initials: JS
authors.lastname: Brownless
authors.forename: Sahand
authors.initials: S
authors.lastname: Mahmoodian
authors.forename: Kokou B
authors.initials: KB
authors.lastname: Dossou
authors.forename: Felix J
authors.initials: FJ
authors.lastname: Lawrence
authors.forename: Lindsay C
authors.initials: LC
authors.lastname: Botten
authors.forename: C Martijn
authors.initials: CM
authors.lastname: de Sterke