Ion-Based High-Harmonic Generation with 1 keV Photon Energy
Hsu-hsin Chu1,2*, Yao-Li Liu1, Jyhpyng Wang3,1,2
1Department of Physics, National Central University, Taoyuan, Taiwan
2Center for High Energy and High Field Physics, National Central University, Taoyuan, Taiwan
3Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan
* Presenter:Hsu-hsin Chu,
An ion-based high-harmonic generation scheme is proposed. The He1+ ions are chosen as the interacting medium to extend the cutoff photon energy over 1 keV. The transverse selective-zoning method of quasi-phase-matching is utilized to overcome the severe plasma dispersion in the highly ionized medium. By using a spatial light modulator to control the quasi-phase-matching pattern, the spectral range can be tuned from water window to keV x-ray. Our calculation shows that the relative conversion efficiency reaches 15% of the perfect phase-matching condition.

Keywords: high-harmonic generation, quasi-phase-matching, keV x-ray, water window