Electric-Field-Induced Coherent Anti-Stokes Raman Scattering of Hydrogen Molecules in Visible Region for Sensitive Field Measurement

Nonintrusive optical measuring of electric fields in space is crucial for various sciences and technologies. In this study, a simple and highly sensitive optical electric field measurement is demonstrated in high-pressure hydrogen by performing electric-field-induced coherent anti-Stokes Raman scattering (E-CARS) in the visible region. The minimum detectable electric field is 0.5 V=mm at atmospheric pressure. This method does not require excited or atomic species and shows a considerably higher sensitivity than those demonstrated by the commonly applied E-CARS method in the infrared region and electric-field-induced second-harmonic generation. This method can be applied to various Raman-active molecules.

Automated summary

This study demonstrates a simple and highly sensitive optical electric field measurement method using electric-field-induced coherent anti-Stokes Raman scattering in high-pressure hydrogen. This method does not require specific excitation or atomic species and has higher sensitivity compared to commonly used methods, making it applicable to various Raman-active molecules.