71 citations · 178 across the 9 of their papers we have counts for
6 papers · 1 filter
Resonantly enhanced filamentation in gases
J. Doussot, G. Karras, F. Billard +2
In this Letter, a low-loss Kerr-driven optical filament in Krypton gas is experimentally reported in the ultraviolet. The experimental findings are supported by ab initio quantum c…
Molecular echoes in space and time
Kang Lin, Peifen Lu, Junyang Ma +13
Mountain echoes are a well-known phenomenon, where an impulse excitation is mirrored by the rocks to generate a replica of the original stimulus, often with reverberating recurrenc…
Fractional Echoes
G. Karras, E. Hertz, F. Billard +7
We report the observation of fractional echoes in a double-pulse excited nonlinear system. Unlike standard echoes which appear periodically at delays which are integer multiple of…
Subcycle engineering of laser filamentation in gas by harmonic seeding
P. Béjot, G. Karras, F. Billard +4
Manipulating at will the propagation dynamics of high power laser pulses is a long-standing dream whose accomplishment would lead to the control of a plethora of fascinating physic…
Harmonic generation and filamentation: when secondary radiations have primary consequences
P. Béjot, G. Karras, F. Billard +4
In this Letter, it is experimentally and theoretically shown that weak odd harmonics generated during the propagation of an infrared ultrashort ultra-intense pulse unexpectedly mod…
On the interpretation of negative birefringence observed in strong-field optical pump-probe experiments: high-order Kerr and plasma grating effects
G. Karras, P. Béjot, J. Houzet +4
The analysis of negative birefringence optically induced in major air components (Loriot et al., [1, 2]) is revisited in light of the recently reported plasma grating-induced phase…