Imaging alignment of rotational state-selected CH3I molecule

被引:2
作者
Song, Le-Le [1 ,2 ,3 ]
Wang, Yan-Hui [4 ]
Wang, Xiao-Chun [1 ,3 ]
Sun, Hong-Tao [1 ,3 ,5 ]
He, Lan-Hai [1 ,3 ]
Luo, Si-Zuo [1 ,3 ]
Hu, Wen-Hui [1 ,3 ]
Li, Dong-Xu [1 ,3 ]
Zhu, Wen-Hui [1 ,3 ]
Sun, Ya-Nan [1 ,3 ]
Ding, Da-Jun [1 ,3 ]
Liu, Fu-Chun [1 ,3 ]
机构
[1] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Jilin, Peoples R China
[2] Jilin Inst Chem Technol, Jilin 132022, Jilin, Peoples R China
[3] Jilin Univ, Jilin Prov Key Lab Appl Atom & Mol Spect, Changchun 130012, Jilin, Peoples R China
[4] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Jilin, Peoples R China
[5] Gen Hosp FAW, Changchun 130011, Jilin, Peoples R China
基金
中国国家自然科学基金;
关键词
hexapole; state selection; velocity map imaging; alignment; SYMMETRIC-TOP MOLECULES; BEAM FOCUS; LASER; PHOTOELECTRON; ORIENTATION; EXCITATION; FIELD;
D O I
10.1088/1674-1056/28/2/023101
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We experimentally and numerically investigate CH3I molecular alignment by using a femtosecond laser and a hexapole. The hexapole provides the single vertical bar 111 > rotational state condition at 4.5-kV hexapole rod voltage. Based on this single rotational state, an enhanced alignment degree of 0.73 is achieved. Our experimental results are in agreement with the simulation results. We experimentally obtain the ion velocity map images and show the influence of the initial rotational-state population. With the I+ ion images and angular distributions at different pump-probe delay time, the alignment and anti-alignment phenomena are further demonstrated. The molecules will be under field-free conditions when the laser effect disappears completely at the full revival time. Our work shows that the quantum control and spatial control on CH3I molecules can be realized and molecular coordinate frame can be obtained for further molecular experiment.
引用
收藏
页数:6
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