Zobrazeno 1 - 10
of 546
pro vyhledávání: '"Lavorel B."'
Technological advances in femtosecond laser sources call for the development of increasingly refined characterization tools implying to enrich the existing panel of operable nonlinear interactions. The present paper describes a novel characterization
Externí odkaz:
http://arxiv.org/abs/2003.01421
Autor:
Hartmann, J. -M., Ma, J., Delahaye, T., Billard, F., Hertz, E., Wu, J., Lavorel, B., Boulet, C., Faucher, O.
Publikováno v:
Phys. Rev. Research 2, 023247 (2020)
We show that the decays with pressure of the alignment echoes induced in N2O-He gas mixtures by two laser pulses with various delays bring detailed information on collision-induced changes of the rotational speed. Measurements and calculations demons
Externí odkaz:
http://arxiv.org/abs/2002.01212
Publikováno v:
EPJ Web of Conferences, Vol 41, p 12007 (2013)
The consideration of the higher-order Kerr effect (HOKE) drastically improves the quantitative agreement between measured and simulated harmonic yield as well as intensity and electron density in laser filaments generated by pulses below a few hundre
Externí odkaz:
https://doaj.org/article/9b70ee2345984ef6aaa0c749a1fece07
Autor:
Ma, J., Zhang, H., Lavorel, B., Billard, F., Hertz, E., Wu, J., Boulet, C., Hartmann, J. -M., Faucher, O.
Energy transfer through quantum coherences plays an essential role in diverse natural phenomena and technological applications, such as human vision, light-harvesting complexes, quantum heat engines, and quantum information and computing. The underst
Externí odkaz:
http://arxiv.org/abs/1908.09531
Publikováno v:
Phys. Rev. A 94, 043403 (2016)
We investigate experimentally and numerically the field-free orientation of the symmetric top molecule of methyl-iodide at high temperature using a terahertz radiation generated by a plasma induced by a two-color laser beam. The degree of orientation
Externí odkaz:
http://arxiv.org/abs/1610.01084
Autor:
Karras, G., Hertz, E., Billard, F., Lavorel, B., Siour, G., Hartmann, J. -M., Faucher, O., Gershnabel, Erez, Prior, Yehiam, Averbukh, Ilya Sh.
Publikováno v:
Phys. Rev. A 94, 033404 (2016)
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 the delay between the two exciting pulses, the fractional echoes appea
Externí odkaz:
http://arxiv.org/abs/1603.01219
Autor:
Karras, G., Hertz, E., Billard, F., Lavorel, B., Hartmann, J. -M., Faucher, O., Gershnabel, E., Prior, Y., Averbukh, I. Sh.
We present what is probably the simplest classical system featuring the echo phenomenon - a collection of randomly oriented free rotors with dispersed rotational velocities. Following excitation by a pair of time-delayed impulsive kicks, the mean ori
Externí odkaz:
http://arxiv.org/abs/1502.00019
Publikováno v:
Phys. Rev. A 92, 053417 (2015)
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 physical phenomena emerging from laser-matter interaction. The present work
Externí odkaz:
http://arxiv.org/abs/1411.4479
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 modify the nonlinear properties of the medium and lead to a strong modifi
Externí odkaz:
http://arxiv.org/abs/1402.3476
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-shift effect predicted for strong field pump-probe experiments (Wahls
Externí odkaz:
http://arxiv.org/abs/1311.1603