TY - JOUR A1 - Petit, Y. A1 - Henin, S. A1 - Kasparian, J. A1 - Wolf, J. P. A1 - Rohwetter, P. A1 - Stelmaszczyk, K. A1 - Hao, Z. Q. A1 - Nakaema, W. M. A1 - Wöste, L. A1 - Vogel, A. A1 - Pohl, T. A1 - Weber, Konradin T1 - Influence of pulse duration, energy, and focusing on laser-assisted water condensation JF - Applied Physics Letters N2 - We investigate the influence of laser parameters on laser-assisted water condensation in the atmosphere. Pulse energy is the most critical parameter. Nanoparticle generation depends linearly on energy beyond the filamentation threshold. Shorter pulses are more efficient than longer ones with saturation at ∼1.5 ps. Multifilamenting beams appear more efficient than strongly focused ones in triggering the condensation and growth of submicronic particles, while polarization has a negligible influence on the process. The data suggest that the initiation of laser-assisted condensation relies on the photodissociation of the air molecules rather than on their photoionization. KW - Luftreinhaltung Y1 - 2011 U6 - https://doi.org/10.1063/1.3546172 SN - 0003-6951 VL - 98 IS - 4 PB - AIP Publishing ER - TY - JOUR A1 - Petrarca, M. A1 - Henin, S. A1 - Stelmaszczyk, K. A1 - Bock, S. A1 - Kraft, S. A1 - Schramm, U. A1 - Vaneph, C. A1 - Vogel, A. A1 - Kasparian, J. A1 - Sauerbrey, R. A1 - Weber, Konradin A1 - Wöste, L. A1 - Wolf, J.-P. T1 - Multijoule scaling of laser-induced condensation in air JF - Applied Physics Letters N2 - 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. KW - Luftreinhaltung Y1 - 2011 U6 - https://doi.org/10.1063/1.3646397 SN - 0003-6951 VL - 99 IS - 14 PB - AIP Publishing ER - TY - JOUR A1 - Henin, S. A1 - Stelmaszczyk, K. A1 - Petrarca, M. A1 - Rohwetter, P. A1 - Hao, Z. Q. A1 - Lüder, J. A1 - Petit, Y. A1 - Vogel, A. A1 - Weber, Konradin A1 - Kasparian, J. A1 - Wöste, L. A1 - Wolf, J.-P. T1 - Laser Filament Induced Water Condensation JF - EPJ Web of Conferences N2 - C Owned by the authors, published by EDP Sciences, 2013 Y1 - 2013 U6 - https://doi.org/10.1051/epjconf/20134112008 VL - 41 PB - edp sciences ER -