Rostock 2019 – wissenschaftliches Programm

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SYXR: Symposium Atomic Physics, Molecular Physics, and Quantum Optics with X-ray FELs

SYXR 1: Atomic Physics, Molecular Physics and Quantum Optics with X-ray FELs

SYXR 1.3: Hauptvortrag

Donnerstag, 14. März 2019, 15:00–15:30, U Audimax

Stimulated X-Ray Emission Spectroscopy for Chemical Analysis — •Nina Rohringer — DESY, Notkestr. 85, 22607 Hamburg

X-ray free-electron lasers (XFEL) deliver X-ray pulses of fs duration, at unprecedented intensities that open avenues for studying nonlinear optical effects and stimulated X-ray emission and scattering. An intriguing future perspective is the development of coherent attosecond nonlinear pump-probe techniques, to study charge and energy transport in chemical reactions and photocatalysis. Stimulated X-ray emission and stimulated X-ray scattering are the fundamental building blocks of these nonlinear spectroscopic techniques. Here we present results on amplified spontaneous K-alpha spectroscopy of Mn compounds in solution [1]. The stimulated emission spectrum was studied as a function of amplification strength. Despite the stark differences to the spontaneous X-ray spectra, stimulated X-ray emission spectroscopy prevails the chemical sensitivity and opens the door to more advanced nonlinear X-ray spectroscopic techniques.

[1] T Kroll, C Weninger, R Alonso-Mori, D Sokaras, D Zhu, L Mercadier, V P Majety, A Marinelli, A Lutman, M W Guetg, F-J Decker, S Boutet, A Aquila, J Koglin, J Koralek, D P DePonte, J Kern, F D Fuller, E Pastor, T Fransson, Y Zhang, J Yano, V K Yachandra, N Rohringer and U Bergmann, Phys. Rev. Lett. 120, 133203 (2018)