title: Analysis of strategies to improve the directionality of square lattice band-edge photonic crystal structures.
abstract: Recently, photonic crystal band-edge structures have been analyzed in the literature. However, most devices that have been presented so far emit light in different directions. We present a modal analysis (no gain included) of a few schemes to improve the directionality of these devices, i.e., in such a way that light that exits from them will travel mainly in a certain direction, eventually coupling its energy to a wide waveguide.
authors.affiliation: Laboratoire d'Electronique, Optoelectronique et Microsystemès, Centre National de la Recherche, Ecole Centrale de Lyon, 36 Avenue de Collongue, 69134 Ecully, France. haroldohattori@hotmail.com
authors.forename: Haroldo T
authors.initials: HT
authors.lastname: Hattori
authors.forename: Vitor M
authors.initials: VM
authors.lastname: Schneider
authors.forename: Rogério M
authors.initials: RM
authors.lastname: Cazo
authors.forename: Carmem L
authors.initials: CL
authors.lastname: Barbosa