CO(X^1Σ^+)分子静电/激光复合场取向  

Orientation of ground-state CO(X^1Σ^+) molecules by combined electrostatic and laser fields

作　　者：黄云霞[1,2] 徐淑武[1,2] 杨晓华[1,2] 

机构地区：[1]理学院,南通大学,南通226007 [2]精密光谱科学与技术国家重点实验室,华东师范大学,上海200062

出　　处：《物理学报》2012年第24期193-198,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11034002);国家重点基础研究发展计划(批准号:2011921602)资助的课题~~

摘　　要：本文从理论上研究了复合静电场和非共振激光场对基态(X1Σ+)CO分子的取向,分别讨论了激光场与分子的绝热作用和非绝热作用.计算结果表明,对于永久偶极矩较小的基态CO(X1Σ+)分子,静电场与激光场产生的隧道对的能级耦合作用可以增强基态CO分子在复合场下的取向.在绝热情况下,即使较弱的静电场也可以获得较好的取向效果,而非绝热情况下,分子取向在激光场关闭后会周期性再现.本文还进一步研究了激光强度、电场强度和温度对取向度的影响.We investigate the orientation of the CO（X1∑＋） molecules in the combined electrostatic and laser fields. We analyze the adiabatic and nonadiabatic interactions of the molecules with the applied laser field. It shows that the pendular energy levels induced by the laser field form the tunneling doublets which can be coupled by the applied electrostatic field. The CO molecules in theX1∑＋ state with small permanent dipoles can be greatly orientated due to the coupling interaction. If the laser field is added adiabatically, the excellent orientation is achieved even at a weak electrostatic field. While in a nonadiabatic case, the molecular orientation reoccurs periodically when the laser field is turned off. Additionally, we study the dependence of the degree of the molecular orientation on the applied laser and electrostatic intensities and the molecular temperature.

关 键 词：取向 CO(X1Σ+)分子 复合场 

分 类 号：O561[理学—原子与分子物理]