Wavelength effect on atomic and molecular high harmonic generation driven by a tunable infrared parametric source.
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.
Wei
Pengfei
P
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Zhang
Chunmei
C
Liu
Candong
C
Huang
Yansui
Y
Leng
Yuxin
Y
Liu
Peng
P
Zheng
Yinghui
Y
Zeng
Zhinan
Z
Li
Ruxin
R
Xu
Zhizhan
Z