title: Chi 3 dispersion in planar tantalum pentoxide waveguides in the telecommunications window.
abstract: We report on the dispersion of the third-order nonlinear susceptibility (chi(3) or "Chi 3") in planar Ta2O5 waveguides in the telecommunications spectral window. We utilize the observation of third-harmonic generation under ultrashort pulsed excitation as a reference-free characterization method of chi(3) and obtain a large nonlinear coefficient, 2x10(-13) esu, at 1550 nm. Our observation of efficient third-harmonic generation in Ta2O5 waveguides in the telecoms window reveals the potential of this material system in high-speed integrated nonlinear optical switches.
authors.affiliation: School of Electronics and Computer Science, University of Southampton, Southampton, UK. rickeychen@gmail.com
authors.forename: Ruiqi Y
authors.initials: RY
authors.lastname: Chen
authors.forename: Martin D B
authors.initials: MD
authors.lastname: Charlton
authors.forename: Pavlos G
authors.initials: PG
authors.lastname: Lagoudakis