Electric-field-induced coherent anti-Stokes Raman scattering in visible region (E-CARSv) generation from nitrogen in air*

Plasmas generated in relatively high-pressure environments, especially in open air, are expected to play an active role in a wide range of applications, including medical and agricultural applications. Theoretical understanding of plasmas generated in relatively high-pressure environments is required to accelerate the development of such plasma applications. In particular, understanding the electric field, one of the most fundamental parameters of plasmas, is important to understand the dynamics occurring in plasmas. Recently, we reported a sensitive electric-field-measurement method based on electric-field-induced coherent anti-Stokes Raman scattering in the visible region (E-CARSv), which is appropriate for the relatively high-pressure of atmospheric pressure [1].

Here we present a generation of E-CARSv at 473 nm from nitrogen molecules [2], which are abundant in air, by applying two nanosecond-pulsed lasers at 4.3 μm and 532 nm. Details, as well as current progress, will be presented at the conference.