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Chin. Phys. B, 2013, Vol. 22(5): 053701    DOI: 10.1088/1674-1056/22/5/053701
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Orientation of KRb molecules in a switched electrostatic field

Huang Yun-Xia (黄云霞)a b, Xu Shu-Wu (徐淑武)a b, Yang Xiao-Hua (杨晓华)a b
a School of Science, Nantong University, Nantong 226007, China;
b State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
Abstract  We theoretically investigate the orientation of the cold KRb molecules induced in a switched electrostatic field by numerically solving the full time-dependent Schrödinger equation. The results show that the periodic field-free molecular orientation can be realized for the KRb molecules by rapidly switching off the electrostatic field. Meanwhile, by varying the switching times of the electrostatic field, the adiabatic and nonadiabatic interactions of the molecules with the applied field can be realized. Moreover, the influences of the electrostatic field strength and the rotational temperature to the degree of the molecular orientation are studied. The investigations show that, the increasing of the electrostatic field will increase the degree of the molecular orientation, both in the constant-field regime and in the field-free regime, while the increasing of the rotational temperature of the cold molecules will greatly decrease the degree of the molecular orientation.
Keywords:  orientation      KRb molecule      electrostatic field  
Received:  04 August 2012      Revised:  12 October 2012      Accepted manuscript online: 
PACS:  37.90.+j (Other topics in mechanical control of atoms, molecules, and ions)  
  33.57.+c (Magneto-optical and electro-optical spectra and effects)  
  42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11034002), the State Key Development Program for Basic Research of China (Grant No. 2011921602), and the Scientific and Technical Project of Nantong City, China (Grant No. BK2011052), and the Qing Lan Project.
Corresponding Authors:  Yang Xiao-Hua     E-mail:  xhyang@ntu.edu.cn; xhyang@phy.ecnu.edu.cn

Cite this article: 

Huang Yun-Xia (黄云霞), Xu Shu-Wu (徐淑武), Yang Xiao-Hua (杨晓华) Orientation of KRb molecules in a switched electrostatic field 2013 Chin. Phys. B 22 053701

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