Polarization coherent anti-Stokes Raman scattering microscopy.

Theoretical and experimental characterization of coherent anti-Stokes Raman scattering microscopy

We present a systematic characterization of coherent anti-Stokes Raman scattering (CARS) microscopy. CARS signal generation in a heterogeneous sample under a tight-focusing condition is formulated by the Green’s function method. The CARS radiation pattern and the forwardand backward-detected CARS signals from a three-dimensional Raman scatterer are calculated. The coherent nature of CARS image ...

Structure of molecular packing probed by polarization-resolved nonlinear four-wave mixing and coherent anti-Stokes Raman-scattering microscopy

Observation of Raman optical activity by heterodyne-detected polarization-resolved coherent anti-Stokes Raman scattering.

We report the first observation of Raman optical activity (ROA) by coherent anti-Stokes Raman scattering. Thanks to the more freedom of polarization configurations in coherent anti-Stokes Raman scattering than in spontaneous Raman spectroscopy, the contrast ratio of the chiral signal to the achiral background has been improved markedly. For (-)-β-pinene, it is 2 orders of magnitude better than ...

Multiplex Coherent Anti-Stokes Raman Scattering Microspectroscopy and Study of Lipid Vesicles

We report a theoretical description and experimental implementation of multiplex coherent anti-Stokes Raman scattering (M-CARS) microspectroscopy using a picosecond pump beam and a femtosecond Stokes beam. The effect of the chirp in the Stokes pulse on a M-CARS spectrum is studied. Polarization-sensitive detection is utilized for suppression of the nonresonant background and for selective detec...

Femtosecond coherent anti-Stokes Raman scattering measurement of gas temperatures from frequency-spread dephasing of the Raman coherence

Gas-phase temperatures and concentrations are measured from the magnitude and decay of the initial Raman coherence in femtosecond coherent anti-Stokes Raman scattering (CARS). A time-delayed probe beam is scattered from the Raman polarization induced by pump and Stokes beams to generate CARS signal; the dephasing rate of this initial coherence is determined by the temperature-sensitive frequenc...