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Nonlinear resonant Auger spectroscopy in CO using an x-ray pump-control scheme

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Zhang,  S. B.
Quantum Optics with X-Rays, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
School of Physics and Information Technology, Shaanxi Normal University;
Center for Free-Electron Laser Science (CFEL);

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Rohringer,  N.
Quantum Optics with X-Rays, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);

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Citation

Zhang, S. B., Kimberg, V., & Rohringer, N. (2016). Nonlinear resonant Auger spectroscopy in CO using an x-ray pump-control scheme. Physical Review A, 94(6): 063413. doi:10.1103/PhysRevA.94.063413.


Cite as: http://hdl.handle.net/21.11116/0000-0001-8F05-9
Abstract
In the present paper we propose nonlinear femtosecond x-ray pump-probe spectroscopy to study the vibrational dynamics of a core-excited molecular state and discuss numerical results in CO. A femtosecond pump resonantly excites the carbon core-excited 1s−1π∗ state of the CO molecule. A second strong probe (control) pulse is applied at variable delay and is resonantly coupled to a valence excited state of the molecule. The strong nonlinear coupling of the control pulse induces Rabi flopping between the two electronic states. During this process, a vibrational wave packet in the core-excited state is created, which can be effectively manipulated by changing the time delay between pump and control pulses. We present an analysis of the resonant Auger electron spectrum and the transient absorption or emission spectrum on the pump transition and discuss their information content for reconstruction of the vibrational wave packet.