Zhang Xiaofan, Zhu Xiaosong, Liu Xi, Wang Dian, Zhang Qingbin, Lan Pengfei, Lu Peixiang
Opt Lett. 2017 Mar 15;42(6):1027-1030. doi: 10.1364/OL.42.001027.
We propose and theoretically demonstrate a method to generate attosecond XUV pulses with tunable ellipticity from aligned molecules irradiated by a bichromatic counterrotating circularly polarized (BCCP) driving laser field. By rotating the BCCP field, the attoseond XUV pulse varies from being left elliptically polarized to right elliptically polarized. The rotation of the BCCP field can be easily achieved by adjusting the relative phases between the two circularly polarized components. This scheme will benefit a broad range of applications, including the exploration of chiral-sensitive properties of the light-matter interaction and time-resolved imaging of magnetic structures.
我们提出并从理论上证明了一种方法，该方法可通过双色反向旋转圆偏振（BCCP）驱动激光场辐照排列的分子来产生具有可调椭圆率的阿秒极紫外（XUV）脉冲。通过旋转BCCP场，阿秒XUV脉冲从左旋椭圆偏振变为右旋椭圆偏振。通过调整两个圆偏振分量之间的相对相位，可以轻松实现BCCP场的旋转。该方案将有益于广泛的应用，包括探索光与物质相互作用的手性敏感特性以及磁性结构的时间分辨成像。
