Orientation Dependence of Photoelectron Angular Distribution in Nitrogen Molecule Irradiated by XUV Laser Field
Xiao-Dong Yang1**, Ming Gao2, Yuan Tian1
1Department of Optical and Electrical Information, Xi'an University of Technological Information, Xi'an 710200 2College of Optoelectronic engineering, Xi'an Technological University, Xi'an 710021
We theoretically study the dependence of photoelectron angular distribution on laser polarization direction in nitrogen molecules. The approach is based on the time-dependent density functional theory at the level of local density approximation complemented by self-interaction correction. It is found that photoelectron emission in one photon regime could be considered as a probing tool for the main character of different types of molecular orbitals ($\sigma$ or $\pi$). The pattern of emitted photoelectrons strongly depends on the polarized angle of the laser, for $\sigma$ orbital, the number of photoelectron decreases with increasing the polarized angle, while for $\pi$ orbital, it has the inverse relation to the polarized angle, which reveals the multi-electron effect in molecules. On the other hand, concerning the total photoelectron emission, one should take into account a few occupied orbitals instead of only the outmost one.
2016, Vol. 33 
