Highly sensitive measurements of electric fields with E-FISH, and key atomic and molecular species with THz absorption spectroscopy and cavity-enhanced spectroscopy techniques (A01)

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: since 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 327886311

The electric field is an important parameter to control a discharge and, in particular, the generation of reactive species. The project aims at the determination of electric fields in plasma using picosecond electric field induced second harmonic generation (E-FISH) technique, which has been studied intensively and has been optimized for non-equilibrium atmospheric pressure plasmas. This work is complemented by two diagnostic techniques: THz absorption spectroscopy and cavity ring-down spectroscopy to determine key atomic and molecular species.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1316: Transient atmospheric plasmas - from plasmas to liquids to solids
• Applicant Institution: Ruhr-Universität Bochum
• Project Heads: Professor Dr. Uwe Czarnetzki, until 12/2025; Professor Dr. Jean-Pierre van Helden, since 1/2026; Dr. Nikita Lepikhin, until 12/2025; Dr. Dirk Luggenhölscher, until 12/2021; Dr. Inna Orel, since 1/2026