Strong terahertz emission enhancement via femtosecond laser filament concatenation in air.
We investigate the emission of terahertz (THz) radiation from two laser filaments in air. An increase by 1 order of magnitude of the overall THz power is found when the two filaments are coherently linked on-axis, leading to a single longer concatenated filament. The observed enhancement is found to be the same for the cases of single-color and two-color filamentation approaches.
Manceau
J-M
JM
Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), P.O. Box 1527, 71110 Heraklion, Greece. manceaujm@iesl.forth.gr
Massaouti
M
M
Tzortzakis
S
S