光场调控原子分子量子态是实现其超快时间演化测量的有效途径。传统意义上调控量子态是通过改变光场振幅、相位、频率等参量得以实现。光场除与偏振有关的自旋角动量，还有与光场螺旋相位相关的轨道角动量，即涡旋光所具有的轨道角动量。当光物质相互作用时会将这两种角动量传递至反应产物。突破可见至长波波段光场的涡旋光控制，本项目拟通过高次谐波产生叠加传递驱动激光场的涡旋特性至XUV短波范围，通过技术分光获得超快可调谐波长的螺旋相位XUV的单色光源，且单色光源具有可控的光子轨道角动量；并且利用角动量可调可控的涡旋光源研究原子分子超快动力学行为，实现对研究对象的量子态的超快调控及实时观测。该手段系控制产生具有螺旋相位的电子波包新技术,为深入研究阿秒电子学提供了技术支持。通过建立的超短涡旋极紫外光源与反映原子分子内部电子运动的光电子成像方法，实现超越常规平面波选择定则的涡旋光物质相互作用机理的新发现。

The manipulation of quantum states with atoms/molecules can be fulfilled effectively through light-matter interaction. In tradition, the measurement of quantum state dynamics could be done by adjusting light parameters including of amplitude、phase、frequency etc. It is actually well known that each photon of a collimated circularly polarized beam carries of angular momentum, which is called spin angular momentum (SAM). And laser beams also have an orbital angular momentum (OAM) imprinting helical phase(optical vortex). Both angular momenta, OAM and SAM, can be transferred to macroscopic objects, paving the way to new applications, at least for visible and long wavelength light source. In this project, we extend the vortex to short wavelength XUV generated through high order harmonic. From which we will obtain controllable and tunable XUV light with defined OAM and helical phase. The XUV vortex will be helpful for manipulating ultrafast atomic and molecular dynamics. The idea is original way to get helical phase electronic wavepackets. One of the most powerful spectroscopic tools provided by HHG is XUV pulses generation of sub-femtosecond duration. The attosecond vortex pulse ionizes the gas target, producing electron wavepackets with helical shape. The extension of vortices into the extreme-ultraviolet (XUV)/X-ray regime constitutes a significant step forward to bring those applications to the nanometer or even atomic scale. Novel sources capable of generating vortices at short wavelengths not only offer the possibility of extending previous applications of optical vortices in the XUV/X-ray regime, but also of exploring and developing applications with no precedence. For example, absorption and photoionization of atoms, molecules, and nanostructures with vortex beams offer a richer light-matter interaction beyond the customary plane-wave selection rules.