Efficient table-top dual-wavelength beamline for ultrafast transient absorption spectroscopy in the soft X-ray region

Abstract

We present a table-top beamline providing a soft X-ray supercontinuum extending up to 350 eV from high-order harmonic generation with sub-13 fs 1300 nm driving pulses and simultaneous production of sub-5 fs pulses centered at 800 nm. Optimization of the high harmonic generation in a long and dense gas medium yields a photon flux of ~2 x 10^7 photons/s/1% bandwidth at 300 eV. The temporal resolution of X-ray transient absorption experiments with this beamline is measured to be 11 fs for 800 nm excitation. This dual-wavelength approach, combined with high flux and high spectral and temporal resolution soft X-ray absorption spectroscopy, is a new route to the study of ultrafast electronic dynamics in carbon-containing molecules and materials at the carbon K-edge.

References in corpus (7)

• Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers
• Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum
• Bright, Coherent, Ultrafast Soft X-Ray Harmonics Spanning the Water Window from a Tabletop Light Source
• 0.5 keV soft X-ray attosecond continua
• Direct and Simultaneous Observation of Ultrafast Electron and Hole Dynamics in Germanium
• Attosecond dispersive soft X-ray absorption fine structure spectroscopy in graphite
• Attosecond state-resolved carrier motion in quantum materials probed by soft X-ray XANES

Cited by in corpus (9)

• Femtosecond Symmetry Breaking and Coherent Relaxation of Methane Cations at the Carbon K-Edge
• Core-valence attosecond transient absorption spectroscopy of polyatomic molecules
• Accurate core excitation and ionization energies from a state-specific coupled-cluster singles and doubles approach
• Source noise suppression in attosecond transient absorption spectroscopy by edge-pixel referencing
• Efficient Coherent XUV Generation and Manipulation in Microfluidic Glass Devices
• Jahn-Teller Distortion and Dissociation of CCl${}_4^{+}$ by Transient X-ray Spectroscopy Simultaneously at the Carbon K- and Chlorine L-Edge
• A benchmark study of core-excited states of organic molecules computed with the generalized active space driven similarity renormalization group
• Core-excited states of SF${}_6$ probed with soft X-ray femtosecond transient absorption of vibrational wavepackets
• Apparatus for generation of nanojoule-class water-window high-order harmonics