Qin Meiyan, Zhu Xiaosong, Zhang Qingbin, Hong Weiyi, Lu Peixiang
Huazhong University of Science and Technology, Wuhan, China.
Opt Express. 2011 Dec 5;19(25):25084-92. doi: 10.1364/OE.19.025084.
We investigate the polarization properties of high harmonic generation from polar molecules with a linearly polarized field. It is found that elliptically polarized harmonics are observed in a wide spectral range from the plateau to the cutoff. Further analyses show that the nonsymmetric structure of the highest occupied molecular orbital is the origin of ellipticity of the harmonics. The results provide a method for generation of large-ellipticity XUV pulses, which will benefit the application of HHG as a tool of detection in materials and biology science.
我们研究了在具有线偏振场的情况下，极性分子高次谐波产生的偏振特性。研究发现，在从平台区到截止区的宽光谱范围内观察到了椭圆偏振谐波。进一步分析表明，最高占据分子轨道的非对称结构是谐波椭圆率的起源。这些结果提供了一种产生大椭圆率极紫外脉冲的方法，这将有利于高次谐波产生作为材料和生物科学中的一种检测工具的应用。
