1k citations · 2.3k across the 29 of their papers we have counts for
15 papers · 1 filter
Phase-matched high-order harmonic generation in pre-ionized noble gases
O. Finke, J. Vábek, M. Nevrkla +8
One of the main difficulties to efficiently generating high-order harmonics in long neutral-gas targets is to reach the phase-matching conditions. One issue is that the medium cann…
Air-photonics terahertz platform with versatile micro-controller based interface and data acquisition
E. Prost, V. Loriot, E. Constant +4
We present a recently developed terahertz platform. An air plasma produced by an ultrashort two-color laser pulse serves as a broadband terahertz source, with electric field that h…
Shaping convex edges in borosilicate glass by single pass perforation with an Airy beam
David Sohr, Jens Ulrich Thomas, Stefan Skupin
We demonstrate curved modifications with lengths of up to 2 mm within borosilicate glass produced by single 1030 nm picosecond laser shots with an Airy beam profile. Plasma ignitio…
An intuitive approach to structuring the three polarization components of light
F. Maucher, S. Skupin, S. A. Gardiner +1
This paper presents intuitive interpretations of tightly focused beams of light by drawing analogies to two-dimensional electrostatics, magnetostatics and fluid dynamics. We use a…
Terahertz emission from laser-driven gas-plasmas: a plasmonic point of view
I. Thiele, B. Zhou, A. Nguyen +8
We disclose an unanticipated link between plasmonics and nonlinear frequency down-conversion in laser-induced gas-plasmas. For two-color femtosecond pump pulses, a plasmonic resona…
All-optical attoclock for imaging tunnelling wavepackets
I. Babushkin, A. J. Galan, J. R. C. Andrade +18
Recent experiments on measuring time-delays during tunnelling of cold atoms through an optically created potential barrier are reinvigorating the controversial debate regarding pos…
Creating Complex Optical Longitudinal Polarization Structures
F. Maucher, S. Skupin, S. A. Gardiner +1
In this paper we show that it is possible to structure the longitudinal polarization component of light. We illustrate our approach by demonstrating linked and knotted longitudinal…
Broadband terahertz emission from two-color fs-laser-induced microplasmas
Illia Thiele, Pedro Gonzalez de Alaiza Martinez, Rachel Nuter +3
We investigate terahertz emission from two-color fs-laser-induced microplasmas. Under strongest focusing conditions, microplasmas are shown to act as point-sources for broadband te…
Filamentation of ultrashort laser pulses in silica glass and KDP crystal: A comparative study
Jérémie Rolle, Luc Bergé, Guillaume Duchateau +1
Ionizing 800-nm femtosecond laser pulses propagating in silica glass and in potassium dihydrogen phosphate (KDP) crystal are investigated by means of a unidirectional pulse propaga…
On the Saturation of the Nonlinear Refractive Index in Atomic Gases
Christian Köhler, Roland Guichard, Emmanuel Lorin +4
Motivated by the ongoing controversy on the origin of the nonlinear index saturation and subsequent intensity clamping in femtosecond filaments, we study the atomic nonlinear polar…
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…
Compression of ultrashort UV pulses in a self-defocusing gas
L. Berge, C. Koehler, S. Skupin
Compression of UV femtosecond laser pulses focused into a gas cell filled with xenon is reported numerically. With a large negative Kerr index and normal dispersion, xenon promotes…
Temporal self-restoration of compressed optical filaments
L. Berge, S. Skupin, G. Steinmeyer
We numerically investigate the propagation of a self-compressed optical filament through a gas-glass-gas interface. Few-cycle light pulses survive a sudden and short order-of-magni…
Supercontinuum generation of ultrashort laser pulses in air at different central wavelengths
S. Skupin, L. Berge
Supercontinuum generation by femtosecond filaments in air is investigated for different laser wavelengths ranging from ultraviolet to infrared. Particular attention is paid on the…
Ultrashort filaments of light in weakly-ionized, optically-transparent media
L. Berge, S. Skupin, R. Nuter +2
Modern laser sources nowadays deliver ultrashort light pulses reaching few cycles in duration, high energies beyond the Joule level and peak powers exceeding several terawatt (TW).…