title: Refractive index modification in glass by laser backwriting ablation of metals.
abstract: We report the use of laser ablation of metal targets onto a glass substrate as a way of producing waveguiding devices. In the geometry employed, the nanosecond pulses used for the ablation pass through the glass substrate, and are focused on the metal surface, which is located in close proximity with the substrate. We present measurements of the refractive index profile obtained with this technique, and present a discussion of the physical mechanisms that produce the profiles measured.
authors.forename: Raul
authors.initials: R
authors.lastname: Rangel-Rojo
authors.forename: A
authors.initials: A
authors.lastname: Castelo
authors.forename: M T
authors.initials: MT
authors.lastname: Flores-Arias
authors.forename: C
authors.initials: C
authors.lastname: Gómez-Reino
authors.forename: C I
authors.initials: CI
authors.lastname: López-Gascón
authors.forename: G F
authors.initials: GF
authors.lastname: de la Fuente