title: Interference effect in scattering loss of high-index-contrast planar waveguides caused by boundary reflections.
abstract: We present theoretical and experimental results on an interference effect caused by boundary reflections on the optical scattering loss in high-index-contrast planar waveguides. Analytical expressions for the polarization-dependent scattering loss are derived using a surface Green's function. For high-index-contrast waveguides of submicrometer dimensions a significant deviation from accepted theory arises, including scattering loss suppression owing to a thin-film interference effect. Our theoretical predictions are confirmed by loss measurements on silicon-on-insulator channel waveguides.
authors.affiliation: Institute for Microstructural Sciences, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada. jens.schmid@nrc-cnrc.gc.ca
authors.forename: J H
authors.initials: JH
authors.lastname: Schmid
authors.forename: A
authors.initials: A
authors.lastname: Delâge
authors.forename: B
authors.initials: B
authors.lastname: Lamontagne
authors.forename: J
authors.initials: J
authors.lastname: Lapointe
authors.forename: S
authors.initials: S
authors.lastname: Janz
authors.forename: P
authors.initials: P
authors.lastname: Cheben
authors.forename: A
authors.initials: A
authors.lastname: Densmore
authors.forename: P
authors.initials: P
authors.lastname: Waldron
authors.forename: D-X
authors.initials: DX
authors.lastname: Xu
authors.forename: K P
authors.initials: KP
authors.lastname: Yap