title: Mid-infrared difference-frequency generation in suspended GaAs waveguides.
abstract: We experimentally demonstrate mid-infrared difference-frequency generation in suspended 181 nm thick GaAs waveguides. Generation of the idler at wavelengths between 2800 and 3150 nm is enabled by form-birefringent phase-matching in ultrahigh index-contrast waveguides. Nonlinear mixing has a measured efficiency of 0.4  W⁻¹ in a 1.2 mm long waveguide using a CW signal tunable between 1490 and 1620 nm and a CW pump tunable between 1018 and 1032 nm at powers of a few mW.
authors.forename: Todd H
authors.initials: TH
authors.lastname: Stievater
authors.forename: Rita
authors.initials: R
authors.lastname: Mahon
authors.forename: Doewon
authors.initials: D
authors.lastname: Park
authors.forename: William S
authors.initials: WS
authors.lastname: Rabinovich
authors.forename: Marcel W
authors.initials: MW
authors.lastname: Pruessner
authors.forename: Jacob B
authors.initials: JB
authors.lastname: Khurgin
authors.forename: Christopher J K
authors.initials: CJ
authors.lastname: Richardson