title: Third-harmonic generation in slow-light chalcogenide glass photonic crystal waveguides.
abstract: We demonstrate third-harmonic generation (THG) in a dispersion-engineered slow-light photonic crystal waveguide fabricated in AMTIR-1 chalcogenide glass. Owing to the relatively low loss and low dispersion in the slow-light (c/30) regime, combined with the high nonlinear figure of merit of the material (∼2), we obtain a relatively large conversion efficiency (1.4×10(-8)/W(2)), which is 30× higher than in comparable silicon waveguides, and observe a uniform visible light pattern along the waveguide. These results widen the number of applications underpinned by THG in slow-light platforms, such as the direct observation of the spatial evolution of the propagating mode.
authors.affiliation: Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia. christelle.monat@ec‐lyon.fr
authors.forename: Christelle
authors.initials: C
authors.lastname: Monat
authors.forename: Marcel
authors.initials: M
authors.lastname: Spurny
authors.forename: Christian
authors.initials: C
authors.lastname: Grillet
authors.forename: Liam
authors.initials: L
authors.lastname: O'Faolain
authors.forename: Thomas F
authors.initials: TF
authors.lastname: Krauss
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton
authors.forename: Douglas
authors.initials: D
authors.lastname: Bulla
authors.forename: Steve
authors.initials: S
authors.lastname: Madden
authors.forename: Barry
authors.initials: B
authors.lastname: Luther-Davies