title: Two-color vibrational, femtosecond, fully resonant electronically enhanced CARS (FREE-CARS) of gas-phase nitric oxide.
abstract: A resonantly enhanced, two-color, femtosecond time-resolved coherent anti-Stokes Raman scattering (CARS) approach is demonstrated and used to explore the nature of the frequency- and time-dependent signals produced by gas-phase nitric oxide (NO). Through careful selection of the input pulse wavelengths, this fully resonant electronically enhanced CARS (FREE-CARS) scheme allows rovibronic-state-resolved observation of time-dependent rovibrational wavepackets propagating on the vibrationally excited ground-state potential energy surface of this diatomic species. Despite the use of broadband, ultrafast time-resolved input pulses, high spectral resolution of gas-phase rovibronic transitions is observed in the FREE-CARS signal, dictated by the electronic dephasing timescales of these states. Analysis and computational simulation of the time-dependent spectra observed as a function of pump-Stokes and Stokes-probe delays provide insight into the rotationally resolved wavepacket motion observed on the excited-state and vibrationally excited ground-state potential energy surfaces of NO, respectively.
authors: Spectral Energies, LLC, 5100 Springfield St., Suite 301, Dayton, Ohio 45431, USA.
authors: Hans U
authors: HU
authors: Stauffer
authors: Spectral Energies, LLC, 5100 Springfield St., Suite 301, Dayton, Ohio 45431, USA.
authors: Sukesh
authors: S
authors: Roy
authors: Spectral Energies, LLC, 5100 Springfield St., Suite 301, Dayton, Ohio 45431, USA.
authors: Jacob B
authors: JB
authors: Schmidt
authors: Aerospace Systems Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
authors: Paul J
authors: PJ
authors: Wrzesinski
authors: Aerospace Systems Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
authors: James R
authors: JR
authors: Gord