Multijoule scaling of laser-induced condensation in air


Multijoule scaling of laser-induced condensation in air

Petrarca, M.; Henin, S.; Stelmaszczyk, K.; Bock, S.; Kraft, S.; Schramm, U.; Vaneph, C.; Vogel, A.; Kasparian, J.; Sauerbrey, R.; Weber, K.; Wöste, L.; Wolf, J.-P.

Using 100 TW laser pulses, we demonstrate that laser-induced nanometric particle generation in air increases much faster than the beam-averaged incident intensity. This increase is due to a contribution from the photon bath, which adds up with the previously identified one from the filaments and becomes dominant above 550 GW/cm2. It appears related to ozone formation via multiphoton dissociation of the oxygen molecules and demonstrates the critical need for further increasing the laser energy in view of macroscopic effects in laser-induced condensation.

Keywords: 42.65.Jx Beam trapping; 52.38.-r Laser-plasma interactions; 92.60.Mt Particles and aerosols; 92.60.Nv Cloud physics and chemistry; self-focusing and thermal blooming

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Permalink: https://www.hzdr.de/publications/Publ-16026
Publ.-Id: 16026