title: Background-free nonlinear microspectroscopy with vibrational molecular interferometry.
abstract: We demonstrate a method for performing nonlinear microspectroscopy that provides an intuitive and unified description of the various signal contributions, and allows the direct extraction of the vibrational response. Three optical fields create a pair of Stokes Raman pathways that interfere in the same vibrational state. Frequency modulating one of the fields leads to amplitude modulations on all of the fields. This vibrational molecular interferometry technique allows imaging at high speed free of nonresonant background, and is able to distinguish between electronic and vibrational contributions to the total signal.
authors.affiliation: Optical Sciences Group, MESA+ Institute for Nanotechnology, University of Twente, 7500AE Enschede, The Netherlands.
authors.forename: Erik T
authors.initials: ET
authors.lastname: Garbacik
authors.forename: Jeroen P
authors.initials: JP
authors.lastname: Korterik
authors.forename: Cees
authors.initials: C
authors.lastname: Otto
authors.forename: Shaul
authors.initials: S
authors.lastname: Mukamel
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Herek
authors.forename: Herman L
authors.initials: HL
authors.lastname: Offerhaus
mesh_terms: D007368:Interferometry / Q000379:methods*; D015336:Molecular Probe Techniques; D017711:Nonlinear Dynamics; D013057:Spectrum Analysis / Q000379:methods*; D014732:Vibration