title: Femtosecond phase-coherent two-dimensional spectroscopy.
abstract: Femtosecond phase-coherent two-dimensional (2D) spectroscopy has been experimentally demonstrated as the direct optical analog of 2D nuclear magnetic resonance. An acousto-optic pulse shaper created a collinear three-pulse sequence with well-controlled and variable interpulse delays and phases,which interacted with a model atomic system of rubidium vapor. The desired nonlinear polarization was selected by phase cycling (coadding experimental results obtained with different interpulse phases). This method may enhance our ability to probe the femtosecond structural dynamics of macromolecules.
authors.affiliation: Department of Electrical Engineering, Center of Ultrafast Laser Applications, Princeton University, Princeton, NJ 08544, USA.
authors.forename: Peifang
authors.initials: P
authors.lastname: Tian
authors.forename: Dorine
authors.initials: D
authors.lastname: Keusters
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Suzaki
authors.forename: Warren S
authors.initials: WS
authors.lastname: Warren
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D005583:Fourier Analysis; D007834:Lasers; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008433:Mathematics; D015394:Molecular Structure; D055095:Optics and Photonics; D017785:Photons; D012413:Rubidium; D013057:Spectrum Analysis / Q000379:methods*; D013997:Time Factors
chemical_list: D012413:Rubidium