title: Coupled-mode theory and propagation losses in photonic crystal waveguides.
abstract: Mode coupling phenomena, manifested by transmission "ministopbands", occur in two-dimensional photonic crystal channel waveguides. The huge difference in the group velocities of the coupled modes is a new feature with respect to the classical Bragg reflection occurring, e.g., in distributed feedback lasers. We show that an adequate ansatz of the classical coupled-mode theory remarkably well accounts for this new phenomenon. The fit of experimental transmission data from GaAs-based photonic crystal waveguides then leads to an accurate determination of the propagation losses of both fundamental and higher, low-group-velocity modes.
authors.forename: Segolene
authors.initials: S
authors.lastname: Olivier
authors.forename: H
authors.initials: H
authors.lastname: Benisty
authors.forename: C
authors.initials: C
authors.lastname: Weisbuch
authors.forename: C
authors.initials: C
authors.lastname: Smith
authors.forename: T
authors.initials: T
authors.lastname: Krauss
authors.forename: R
authors.initials: R
authors.lastname: Houdre