title: Enhanced spontaneous Raman scattering in silicon photonic crystal waveguides on insulator.
abstract: We study the spontaneous Raman scattering in a W1 photonic crystal waveguide on silicon-on-insulator where the lower silica cladding remains. Despite the vertical asymmetry that exists in such a waveguide, we numerically and experimentally show that the propagation losses at the pump and the Stokes wavelengths remain low enough to allow a significant exaltation of the spontaneous Raman scattering. In particular, we observe a reshaping of the Raman spectrum and a more than ten-fold enhancement of the Raman scattering efficiency in a W1 photonic crystal waveguide as compared to a single-mode ridge waveguide.
authors.affiliation: Institut d'Electronique Fondamentale, CNRS Univ Paris Sud XI, Bâtiment 220, F-91405 Orsay Cedex, France. xavier.checoury@ief.u-psud.fr
authors.forename: Xavier
authors.initials: X
authors.lastname: Checoury
authors.forename: Moustafa
authors.initials: M
authors.lastname: El Kurdi
authors.forename: Zheng
authors.initials: Z
authors.lastname: Han
authors.forename: Philippe
authors.initials: P
authors.lastname: Boucaud