title: Third-order nonlinear optical properties of complexes with MM triple and quadruple bonds (M = Mo, W) at 1064 nm by degenerate four-wave mixing.
abstract: Measurements of the third-order nonlinear optical responses of solutions of the metal-metal multiply bonded complexes Mo(2)(OPr(i))(6), W(2)(OBu(t))(6), M(2)(NMe(2))(6), M(2)(O(2)CBu(t))(4), and M(2)Cl(4)(PMe(3))(4) (M = Mo, W), using picosecond degenerate four-wave mixing at 1064 nm, are reported. These complexes display only very small instantaneous electronic polarizations when excited with cross-polarized beams. When the excitation beams are similarly polarized, a significant third-order optical response is detected, which is attributable to the formation of bulk thermal excitation gratings. Time-dependent measurements support this view.
authors.affiliation: Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, USA.
authors.forename: Brian D
authors.initials: BD
authors.lastname: Pate
authors.forename: Jonathan R G
authors.initials: JR
authors.lastname: Thorne
authors.forename: Damon R
authors.initials: DR
authors.lastname: Click
authors.forename: Malcolm H
authors.initials: MH
authors.lastname: Chisholm
authors.forename: Robert G
authors.initials: RG
authors.lastname: Denning