Department of Chemistry, University of Aarhus, DK-8000 Aarhus C, Denmark.
Phys Chem Chem Phys. 2009 Nov 14;11(42):9912-8. doi: 10.1039/b910423b. Epub 2009 Aug 25.
A strong inhomogeneous static electric field is used to spatially disperse a rotationally cold supersonic beam of 2,6-difluoroiodobenzene molecules according to their rotational quantum state. The molecules in the lowest-lying rotational states are selected and used as targets for 3-dimensional alignment and orientation. The alignment is induced in the adiabatic regime with an elliptically polarized, intense laser pulse and the orientation is induced by the combined action of the laser pulse and a weak static electric field. We show that the degree of 3-dimensional alignment and orientation is strongly enhanced when rotational state-selected molecules, rather than molecules in the original molecular beam, are used as targets.
强非均匀静电场用于根据旋转量子态对旋转冷超音速 2,6-二氟碘苯分子束进行空间离散。选择最低旋转态的分子作为用于三维对准和取向的目标。在绝热条件下用椭圆偏振强激光脉冲诱导对准，通过激光脉冲和弱静电场的共同作用诱导取向。我们表明，当将旋转态选择的分子而不是原始分子束中的分子用作靶时，三维对准和取向的程度得到了极大增强。
