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Chin. Phys. B, 2012, Vol. 21(7): 073203    DOI: 10.1088/1674-1056/21/7/073203
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Suppressing the weakly bound states in the photoassociation dynamics by a frequency cut-off laser pulse

Lin Feng, Zhang Wei, Zhao Ze-Yu, Cong Shu-Lin
School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
Abstract  The photoassociation dynamics of ultracold lithium atoms controlled by a cut-off pulse has been investigated theoretically by solving numerically the time-dependent Schrödinger equation using the mapped Fourier grid method. The frequency components of the laser pulse close to the atomic resonance are partly cut off. Compared with the typical Gauss-type pulses, the cut-off pulse is helpful to suppress efficiently the weakly bound states and prepare the associated molecules in the lower vibrational states. Especially, the dependence of photoassociation probability on the cut-off position of the laser pulse is explored.
Keywords:  photoassociation      cut-off laser pulse      ultracold molecules  
Received:  05 December 2011      Revised:  19 December 2011      Published:  01 June 2012
PACS:  32.80.Qk (Coherent control of atomic interactions with photons)  
  34.50.Rk (Laser-modified scattering and reactions)  
  82.50.Nd (Control of photochemical reactions)  
  82.53.Kp (Coherent spectroscopy of atoms and molecules)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10974024) and the SRFDP, China (Grant No. 20090041110025).
Corresponding Authors:  Cong Shu-Lin     E-mail:  shlcong@dlut.edu.cn

Cite this article: 

Lin Feng, Zhang Wei, Zhao Ze-Yu, Cong Shu-Lin Suppressing the weakly bound states in the photoassociation dynamics by a frequency cut-off laser pulse 2012 Chin. Phys. B 21 073203

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