Abstract
For investigations of microscale thermo-fluid structure in gas flow, a non-intrysive sensing technique was proposed using coherent anti-stokes Raman scattering (CARS). This technique enables us to obtain the informations from molecule with high spatial and temporal resolutions by a femtosecond pulse laser. The scattered light of vibrationally resonant gas and nonresonant gas was measured for CO_2 and N_2 respectively. Calculating the difference between high intensity from each gas realizes detecting a specific gas flow.
