X-ray lasing in diatomic molecules

28th International Conference on Photonic, Electronic and Atomic Collisions

Kimberg, Victor^1 ; Rohringer, Nina^1

Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany Center for Free-Electron Laser Science, Lumper Chaussee 149, 22761, Hamburg, Germany^1

关键词: Diatomic molecules;    Fluorescence band;    Fluorescence bandwidth;    Maxwell-Bloch equation;    Polarization control;    Transition dipole moments;    Vibrational quanta;    X-ray free electron lasers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032019/pdf
DOI  :  10.1088/1742-6596/488/3/032019

来源: IOP

【 摘 要 】

We predict high-gain x-ray lasing in diatomic molecules by ultrafast core ionization of the C K- and O K-edges in CO and the N K-edge in N2with an x-ray free-electron laser source. We solve generalized Maxwell-Bloch equations, keeping track of the electronic and nuclear degrees of freedom. By controlling the molecular alignment and thereby the alignment of the transition dipole moment polarization control of the emitted x-ray radiation is achievable. Despite the broad fluorescence bandwidth, the amplified x-ray emission shows a narrow spectrum. Preparing the initial vibrational quantum state, the x-ray emission frequency can be tuned within the fluorescence band.