title: Hyperpolarizability dispersion measured for (CH3)2O.
abstract: The third-order nonlinear-optical susceptibility of dimethyl ether, (CH3)2O, has been measured in the gas phase over the wavelength range 488 nm < λ < 1064 nm using the technique of gas-phase electric-field-induced second-harmonic generation with periodic phase matching and with N2 as the reference gas. Measurements span a range of temperature, which allows for separation of the temperature-independent second hyperpolarizability term from the temperature-dependent first hyperpolarizability term. The dispersion curves of the isotropically averaged first and second hyperpolarizabilities (β and γ) are deduced.
authors.affiliation: School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa.
authors.forename: Vincent W
authors.initials: VW
authors.lastname: Couling
authors.affiliation: Department of Physics and Astronomy, University of Nevada, Las Vegas, Nevada 89154-4002, USA.
authors.forename: David P
authors.initials: DP
authors.lastname: Shelton