Wei Pengfei, Zhang Chunmei, Liu Candong, Huang Yansui, Leng Yuxin, Liu Peng, Zheng Yinghui, Zeng Zhinan, Li Ruxin, Xu Zhizhan
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Opt Express. 2009 Aug 17;17(17):15061-7. doi: 10.1364/oe.17.015061.
We experimentally investigate the wavelength effect on high-order harmonic generation (HHG) in CH(4) molecules and Xe atoms driven by a tunable infrared parametric source, and observe that the molecular HHG around the vibrational resonance is more sensitive to the driver wavelength than HHG from an atomic gas with comparable ionization potential. The results can be attributed to the light nuclear motion induced by the driving laser field, and it becomes possible to control the proton vibration in the molecular HHG by tuning the infrared wavelength of the driving laser.
我们通过实验研究了可调谐红外参量源驱动下，波长对CH(4)分子和Xe原子中高次谐波产生（HHG）的影响，并观察到在振动共振附近的分子HHG比具有可比电离势的原子气体产生的HHG对驱动波长更敏感。该结果可归因于驱动激光场引起的轻核运动，并且通过调谐驱动激光的红外波长来控制分子HHG中的质子振动成为可能。
