Nonadiabatic laser-induced orientation and alignment of rotational-state-selected CH3Br molecules

作者：Luo, Sizuo; Zhu, Ruihan; He, Lanhai; Hu, Wenhui; Li, Xiaokai; Ma, Pan; Wang, Chuncheng; Liu, Fuchun; Roeterdink, Wim G.; Stolte, Steven; Ding, Dajun^*

来源：Physical Review A, 2015, 91(5): 053408.

DOI：10.1103/PhysRevA.91.053408

• SYMMETRIC-TOP MOLECULES
• OCS MOLECULES
• BEAM FOCUS
• FIELDS

Nonadiabatic orientation and alignment of hexapole rotational-state-selected methyl bromine (CH3Br) molecules is studied. The temporal evolution of the mixed dc field and laser-induced orientation and alignment is measured by a pump-probe method. The temporal orientation and alignment transients are in good agreement with the time-dependent Schrodinger equation calculation we perform. We show that the degree of orientation and alignment is strongly dependent on the selected initial rotational state. The temporal transients originating from two different initial states, the vertical bar 111 > state and the mixed vertical bar 111 > + vertical bar 212 > state, are discussed. Our results show a maximum degree of < cos theta > = -0.7 for the orientation of CH3Br molecules in the vertical bar 111 > state.

• 出版日期2015-5-11
• 单位吉林大学; 长春理工大学