Time-resolved molecular dynamics using XUV ionization of aligned molecules
Final Report Abstract
In conclusion, within this project, we have installed and demonstrated the possibility to generate a broadband, soft X-ray pulse from 70 eV to 150 eV, with an attosecond pulse duration, using a combined 800 nm+1300 nm laser scheme. While the initial experimental setup has limited the extension of the photon energy to 300 eV, the recent installation of a new high power, high repetition rate femtosecond laser system and the development of new schemes for the generation of high-order harmonics at high gas pressure at the MBI should allow us to reach the desired photon energy. We have also provided at a free electron laser a first demonstration that time-resolved coreshell photoelectron spectroscopy can be used to investigate ultrafast molecular processes. We are therefore convinced that the scheme that has been developed in this proposal to generate ultrashort pulses of short wavelength radiation will be extremely useful in the near future to pursue our investigation of photo-induced molecular dynamics by means of time-resolved photoelectron spectroscopy and diffraction, as well as by new opportunities to explore ultrafast processes in condensed phase. In this context, we also demonstrated the potential use of our source to probe extremely small scale atomic motion in a LiBH4 lattice occurring on a few “femtometer” scale, by means of femtosecond soft X-ray absorption spectroscopy.
Publications
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„Bright attosecond soft X-ray pulse trains by transient phase-matching in two-color high-order harmonic generation“, Optics Express, 23, 248407, (2015)
Bernd Schütte, Paul Weber, Katalin Kovács, Emeric Balogh, Balázs Major, Valer Tosa, Songhee Han, Marc J. J. Vrakking, katalin Varjú, and Arnaud Rouzée
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“Ultrafast modulation of electronic structure by coherent phonon excitations“, Physical Review B, 95, 081101(R), (2017)
Jannick Weisshaupt, Arnaud Rouzée, Michael Woerner, Marc J. J. Vrakking, Thomas Elsaesser, Eric L. Shirley and Andreas Borgschulte
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“Spectral shift and asymmetries in mid-infrared assisted high-order harmonic generation”, Journal of Optical Society of America B, vol. 35, Issue 4, pp. A32-A38 (2018)
Balázs Major, Emeric Balogh, Katalin Kovács, Songhee Han, Bernd Schütte, Paul Weber, Marc J. J. Vrakking, Valer Tosa, Arnaud Rouzée and katalin Varjú
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“Time-resolved inner-shell photoelectron spectroscopy: from a bound molecule to an isolated atom”, Phys. Rev. A 7(4), 043429 (2018)
Felix Brauße et al.
