title: Broadband vibrational sum frequency generation spectroscopy of a liquid surface.
abstract: An important advance in surface science has been the evolution of sum frequency generation to the application of studying surface structure and chemistry of liquid surfaces at the molecular-level by probing the vibrational signatures of surface molecules. Recently, broad-bandwidth sum frequency generation (BBSFG) spectroscopy has become an important tool for investigating gas-solid interfaces. BBSFG spectroscopy allows, theoretically, a surface sum frequency spectrum to be acquired within one pulse of the laser. In this paper, the viability of BBSFG to study inherently small nonlinear response interfaces and the time-resolving capability of this surface-selective technology are demonstrated. Presented here are the first published accounts of spectra from a liquid surface utilizing the broad-bandwidth sum frequency technology with acquisition times as low as 500 milliseconds.
authors.affiliation: Ohio State University, Department of Chemistry, 100 W. 18th Ave., Columbus, OH 43210, USA.
authors.forename: E L
authors.initials: EL
authors.lastname: Hommel
authors.forename: G
authors.initials: G
authors.lastname: Ma
authors.forename: H C
authors.initials: HC
authors.lastname: Allen