High-flux high harmonic soft X-ray generation up to 10kHz repetition rate

Hüve, Jana; Haarlammert, Thorben; Steinbrück, T.; Kutzner, J.; Tsilimis, G.; Zacharias, H.

doi:10.1016/j.optcom.2006.04.063

Cited by 23 publications

(8 citation statements)

References 29 publications

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“…Laser intensities on the order of 10 13 −10 14 W/cm 2 are required to generate high harmonics in noble gases. In the setup employed for this experiment, a Ti:Sapphire laser system is used to generate ultrashort laser pulses with a pulse energy of about 1 mJ, a pulse duration of 30 fs [9] at 6 kHz repetition rate. These ultrashort pulses are focused onto an Ar gas target similar to the set-up of Spielmann et al [10] for nonlinear frequency conversion.…”

Section: Methodsmentioning

confidence: 99%

Final-state effects in photoemission experiments from graphene on Ni(111)

et al. 2013

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Photon-energy dependent photoemission experiments using high harmonic radiation as a tunable photon source on epitaxially grown graphene on a Ni(111) substrate are presented. A resonance in the photoemission cross section for the σ and π states of graphene was observed and compared to a simple model for the determination of photoemission cross sections of free standing graphene, pointing out the role of the interaction of graphene with the nickel substrate.

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Section: Methodsmentioning

confidence: 99%

Final-state effects in photoemission experiments from graphene on Ni(111)

et al. 2013

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“…As an example, HHG spectra extending up to photon energies of 100 eV were achieved in Ref. [19] by pumping noble gases with femtosecond Ti:sapphire laser pulses of 10 14 − 10 15 W/cm 2 peak intensity.…”

Section: Introductionmentioning

confidence: 99%

Monochromatization of femtosecond XUV light pulses with the use of reflection zone plates

Metje¹,

Borgwardt²,

Moguilevski³

et al. 2014

Opt. Express

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Abstract:We report on a newly built laser-based tabletop setup which enables generation of femtosecond light pulses in the XUV range employing the process of high-order harmonic generation (HHG) in a gas medium. The spatial, spectral, and temporal characteristics of the XUV beam are presented. Monochromatization of XUV light with minimum temporal pulse distortion is the central issue of this work. Off-center reflection zone plates are shown to be superior to gratings when selection of a desired harmonic is carried out with the use of a single optical element. A cross correlation technique was applied to characterize the performance of the zone plates in the time domain. By using laser pulses of 25 fs length to pump the HHG process, a pulse duration of 45 fs for monochromatized harmonics was achieved in the present setup. R. Leone, "Ultrafast time-resolved soft X-Ray photoelectron spectroscopy of dissociating Br 2 ," Phys. Rev. Lett. 87, 193002 (2001 265-267 (1986

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“…Often, the technological and methodological challenges for the generation and application of attosecond pulses are very different from those for femtosecond pulses. As we are describing our approach with femtosecond resolution we shall concentrate in the following on femtosecond pulses from High Harmonic Generation (HHG) (1,2,(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). The applications of such pulses range from spectroscopy (1,2,(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) to microscopy (28,29) and coherent diffraction or holography (30)(31)(32)(33).…”

Section: Introductionmentioning

confidence: 99%

Femtosecond time-resolved photoelectron spectroscopy with a vacuum-ultraviolet photon source based on laser high-order harmonic generation

Wernet

Gaudin

Godehusen

et al. 2011

Review of Scientific Instruments

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A laser-based tabletop approach to femtosecond time-resolved photoelectron spectroscopy with photons in the vacuum-ultraviolet (VUV) energy range is described. The femtosecond VUV pulses are produced by high-order harmonic generation (HHG) of an amplified femtosecond Ti:sapphire laser system. Two generations of the same set up and results from photoelectron spectroscopy in the gas phase are discussed. In both generations a toroidal grating monochromator was used to select one harmonic in the photon energy range of 20-30 eV. The first generation of the set up was used to perform photoelectron spectroscopy in the gas phase to determine the bandwidth of the source. We find that our HHG source has a bandwidth of 140±40 meV. The second and current generation is optimized for femtosecond pump-probe photoelectron spectroscopy with high flux and a small spot size at the sample of the femtosecond probe pulses. The VUV radiation is focused into the interaction region with a toroidal mirror to a spot smaller than 100 x 100 μm 2 and the flux amounts to 10 10 photons/s at the sample at a repetition rate of 1 kHz. The duration of the monochromatized VUV pulses is determined to be 120 femtoseconds resulting in an overall pump-probe time resolution of 135±5 fs. We show how this set up can be used to map the transient valence electronic structure in molecular dissociation.3

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High-flux high harmonic soft X-ray generation up to 10kHz repetition rate

Cited by 23 publications

References 29 publications

Final-state effects in photoemission experiments from graphene on Ni(111)

Final-state effects in photoemission experiments from graphene on Ni(111)

Monochromatization of femtosecond XUV light pulses with the use of reflection zone plates

Femtosecond time-resolved photoelectron spectroscopy with a vacuum-ultraviolet photon source based on laser high-order harmonic generation

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