We investigate the concentration dependence of the femtosecond coherent anti-stokes Raman scattering (CARS) signals collected from several mixtures of molecules. We demonstrate a clear quadratic dependence of the transmitted CARS signal on the number of molecules of pyridine in water by looking at the Raman signal at 1030 cm-1. Using a backscattering configuration we study the quadratic concentration dependence in solid mixtures of dipicolinic acid, calcite, and gypsum in powder form.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Coherent Raman
- Coherent anti-Stokes Raman scattering (CARS)
- Raman spectroscopy