title: Near-infrared characterization of gallium nitride photonic-crystal waveguides and cavities.
abstract: We report the design and optical characterization of fully suspended wire waveguides and photonic crystal (PhC) membranes fabricated on a gallium nitride layer grown on silicon substrate operating at 1.5 μm. W1-type PhC waveguides are coupled with suspended wires and are investigated using a standard end-fire setup. The experimental and theoretical dispersion properties of the propagating modes in the wires and photonic-crystal waveguides are shown. Modified L3 cavities with quality factors of up to 2200 and heterostructure cavities with quality factors of up to 5400 are experimentally demonstrated.
authors.affiliation: Institut de Physique de la Matière Condensée, École Polytechnique Fédérale de Lausanne (EPFL), Station 3, Lausanne CH-1015, Switzerland. ulagalandha.dharanipathy@epfl.ch
authors.forename: U
authors.initials: U
authors.lastname: Dharanipathy
authors.forename: N
authors.initials: N
authors.lastname: Vico Triviño
authors.forename: C
authors.initials: C
authors.lastname: Yan
authors.forename: Z
authors.initials: Z
authors.lastname: Diao
authors.forename: J-F
authors.initials: JF
authors.lastname: Carlin
authors.forename: N
authors.initials: N
authors.lastname: Grandjean
authors.forename: R
authors.initials: R
authors.lastname: Houdré