Imprints of molecular orbitals using photoelectron angular distribution by strong laser pulses of circular polarization  

作　　者：任向河 吴艳 张敬涛 马慧 许玉龙 

机构地区：[1]School of Sciences,Shandong Polytechnic University [2]Department of Physics,Zhejiang University of Science & Technology [3]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2013年第7期148-152,共5页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.11104167,11174304,and 61078080);the Excellent Middle-Aged and Youth Scientist Award of Shandong Province,China(Grant No.BS2011SF021); and the Scientific Research Foundation for the Returned Overseas Chinese Scholars

摘　　要：We theoretically investigate the strong-field ionization of H＋2 molecules in four different electronic states by calculating photoelectron angular distributions in circularly polarized fields. We find that the structure of photoelectron angular distribution depends on the molecular orbital as well as the energy of the photoelectron. The location of main lobes changes with the symmetric property of the molecular orbital. Generally, for molecules with bonding electronic states, the photoelectron’s angular distribution shows a rotation of π/2 with respect to the molecular axis, while for molecules with antibonding electronic states, no rotation occurs. We use an interference scenario to interpret these phenomena. We also find that, due to the interference effect, a new pair of jets appears in the waist of the main lobes, and the main lobes or jets of the photoelectron’s angular distribution are split into two parts if the photoelectron energy is sufficiently high.We theoretically investigate the strong-field ionization of H＋2 molecules in four different electronic states by calculating photoelectron angular distributions in circularly polarized fields. We find that the structure of photoelectron angular distribution depends on the molecular orbital as well as the energy of the photoelectron. The location of main lobes changes with the symmetric property of the molecular orbital. Generally, for molecules with bonding electronic states, the photoelectron’s angular distribution shows a rotation of π/2 with respect to the molecular axis, while for molecules with antibonding electronic states, no rotation occurs. We use an interference scenario to interpret these phenomena. We also find that, due to the interference effect, a new pair of jets appears in the waist of the main lobes, and the main lobes or jets of the photoelectron’s angular distribution are split into two parts if the photoelectron energy is sufficiently high.

关 键 词：photoelectron angular distributions circular polarization laser field PHOTOIONIZATION MOLECULE 

分 类 号：O561[理学—原子与分子物理]