Journal ArticleDOI
Compensation of optical path lengths in extreme-ultraviolet and soft-x-ray monochromators for ultrafast pulses
TLDR
The aim of this study is the selection without dispersion of one or more high-order laser harmonics produced by a pulse lasting a few femtoseconds and interacting with a gas jet.Abstract:
The extraction of the spectrum corresponding to a single extreme-ultraviolet ultrashort pulse embedded in an extended spectrum may alter the duration of the pulse itself. This is due to the spectral filtering of optics and the differences in the optical path of the rays caused by ordinary diffraction when a grating is used. The basic mechanism that leads to the latter effect is the difference of one wavelength of the path length of two rays diffracted at the first order by nearby grating grooves. A study of these effects and some possible solutions obtained from using a pair of diffraction gratings is presented. The aim of this study is the selection without dispersion of one or more high-order laser harmonics produced by a pulse lasting a few femtoseconds and interacting with a gas jet.read more
Citations
More filters
Journal ArticleDOI
Single-grating monochromator for extreme-ultraviolet ultrashort pulses
Fabio Frassetto,Cephise Cacho,C. A. Froud,I C Edmund Turcu,Paolo Villoresi,W. A. Bryan,Emma Springate,Luca Poletto +7 more
TL;DR: Extreme-ultraviolet high-order-harmonic pulses with 1.6·10(7) photons/pulse at 32.5 eV have been separated from multiple harmonic orders by a time-preserving monochromator using a single grating in the off-plane mount to give minimum temporal broadening and high efficiency.
Journal ArticleDOI
Angle-resolved photoemission spectroscopy with a femtosecond high harmonic light source using a two-dimensional imaging electron analyzer.
Stefan Mathias,Luis Miaja-Avila,Margaret M. Murnane,Henry C. Kapteyn,Martin Aeschlimann,Michael Bauer +5 more
TL;DR: An experimental setup for time- and angle-resolved photoemission spectroscopy using a femtosecond 1 kHz high harmonic light source and a two-dimensional electron analyzer for parallel energy and momentum detection is presented.
Journal ArticleDOI
Laser-based apparatus for extended ultraviolet femtosecond time-resolved photoemission spectroscopy
Peter Siffalovic,Markus Drescher,M Spieweck,T Wiesenthal,Y.C. Lim,R Weidner,A Elizarov,Ulrich Heinzmann +7 more
TL;DR: In this paper, a monochromator was used for electron spectroscopy on gas phase helium and xenon with the intensity ratio between the selected and its adjacent harmonic not exceeding 10:1.
Journal ArticleDOI
High-order harmonic generation and other intense optical field-matter interactions: review of recent experimental and theoretical advances
TL;DR: An overview of recent experimental and theoretical developments in high-order harmonic generation (HHG), above threshold ionization (ATI), and other phenomena originating in intense optical field-matter interactions is attempted in this article.
Journal ArticleDOI
Tunable ultrafast extreme ultraviolet source for time- and angle-resolved photoemission spectroscopy
TL;DR: First applications demonstrate the capabilities of the instrument to easily select the probe wavelength of choice, to obtain angle-resolved photoemission maps, and to trace ultrafast electron dynamics in an optically excited semiconductor (Ge).
References
More filters
Journal ArticleDOI
Plasma perspective on strong field multiphoton ionization.
TL;DR: During strong-field multiphoton ionization, a wave packet is formed each time the laser field passes its maximum value, and one important parameter which determines the strength of these effects is the rate at which the wave packet spreads in the direction perpendicular to the laser electric field.
Journal ArticleDOI
Compression of high-energy laser pulses below 5 fs
Mauro Nisoli,S. De Silvestri,Orazio Svelto,Robert Szipocs,K. Ferencz,Ch. Spielmann,S. Sartania,Ferenc Krausz +7 more
TL;DR: High-energy 20-fs pulses generated by a Ti:sapphire laser system were spectrally broadened to more than 250 nm by self-phase modulation in a hollow fiber filled with noble gases and subsequently compressed in a broadband high-throughput dispersive system, resulting in the shortest generated to date at multigigawatt peak powers.
Journal ArticleDOI
Atomic physics with super-high intensity lasers
TL;DR: In this article, the authors review the phenonomena which occur in multiphoton physics when the electric field of the applied laser radiation becomes comparable with the Coulomb field strength seen by an electron in the ground state of atomic hydrogen.
Journal ArticleDOI
Attosecond pulse trains using high-order harmonics
TL;DR: It is demonstrated that high-order harmonics generated by an atom in intense laser field form trains of ultrashort pulses corresponding to different trajectories of electrons that tunnel out of the atom and recombine.
Journal ArticleDOI
General ray-tracing procedure
Gordon Spencer,M. V. R. K. Murty +1 more
TL;DR: In this article, a vector form of the diffraction law is suggested for tracing skew rays through optical systems containing cylindrical and toric surfaces of arbitrary orientation and position, with particular attention given to the treatment of diffraction gratings.