199 citations · 705 across the 10 of their papers we have counts for
10 papers
Terahertz pulse generation by two-color laser fields with circular polarization
C. Tailliez, A. Stathopulos, S. Skupin +4
We study the influence of the polarization states of femtosecond two-color pulses ionizing gases on the emitted terahertz radiation. A local-current model and plane-wave evaluation…
Sequential terahertz pulse generation by photoionization and coherent transition radiation in underdense relativistic plasmas
J. Déchard, A. Debayle, X. Davoine +2
Terahertz (THz) emission by two-color, ultrashort optical pulses interacting with underdense helium gases at ultrahigh intensities () is investigated by…
Spectral dynamics of THz pulses generated by two-color laser filaments in air: The role of Kerr nonlinearities and pump wavelength
A. Nguyen, P. Gonzalez de Alaiza Martinez, J. Dechard +4
We theoretically and numerically study the influence of both instantaneous and Raman-delayed Kerr nonlinearities as well as a long-wavelength pump in the terahertz (THz) emissions…
Theory of terahertz emission from femtosecond-laser-induced micro-plasmas
I. Thiele, R. Nuter, B. Bousquet +5
We present a theoretical investigation of terahertz (THz) generation in laser-induced gas plasmas. The work is strongly motivated by recent experimental results on micro-plasmas, b…
Boosting terahertz generation in laser-field ionized gases using a sawtooth wave shape
P. González de Alaiza Martínez, I. Babushkin, L. Bergé +6
Broadband ultrashort terahertz (THz) pulses can be produced using plasma generation in a noble gas ionized by femtosecond two-color pulses. Here we demonstrate that, by using multi…
The fundamental solution of the unidirectional pulse propagation equation
I. Babushkin, L. Bergé
The fundamental solution of a variant of the three-dimensional wave equation known as "unidirectional pulse propagation equation" (UPPE) and its paraxial approximation is obtained.…
Tailoring THz radiation by controlling tunnel photoionization events in gases
I. Babushkin, S. Skupin, A. Husakou +4
Applications ranging from nonlinear terahertz spectroscopy to remote sensing require broadband and intense THz radiation which can be generated by focusing two-color laser pulses i…
Ultrafast spatio-temporal dynamics of terahertz generation by ionizing two-color femtosecond pulses in gases
I. Babushkin, W. Kuehn, C. Koehler +6
We present a combined theoretical and experimental study of spatio-temporal propagation effects in terahertz (THz) generation in gases using two-color ionizing laser pulses. The ob…
Collapsing dynamics of attractive Bose-Einstein condensates
L. Berge, J. Juul Rasmussen
The self-similar collapse of 3D and quasi-2D atom condensates with negative scattering length is examined. 3D condensates are shown to blow up following the scenario of {\it weak c…
Influence of four-wave mixing and walk-off on the self-focusing of coupled waves
L. Berge, O. Bang, W. Krolikowski
Four-wave mixing and walk-off between two optical beams are investigated for fo cusing Kerr media. It is shown that four-wave mixing reinforces the self-focusi ng of mutually-trapp…