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

doi:10.1088/1674-1056/21/7/073203

中国物理B ›› 2012, Vol. 21 ›› Issue (7): 73203-073203.doi: 10.1088/1674-1056/21/7/073203

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

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

林峰, 张为, 赵泽宇, 丛书林

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

收稿日期:2011-12-05 修回日期:2011-12-19 出版日期:2012-06-01 发布日期:2012-06-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10974024) and the SRFDP, China (Grant No. 20090041110025).

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

Lin Feng(林峰), Zhang Wei(张为), Zhao Ze-Yu(赵泽宇), and Cong Shu-Lin(丛书林)^†

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

Received:2011-12-05 Revised:2011-12-19 Online:2012-06-01 Published:2012-06-01
Contact: Cong Shu-Lin E-mail:shlcong@dlut.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10974024) and the SRFDP, China (Grant No. 20090041110025).

摘要/Abstract

摘要： 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.

关键词: photoassociation, cut-off laser pulse, ultracold molecules

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.

Key words: photoassociation, cut-off laser pulse, ultracold molecules

中图分类号: (Coherent control of atomic interactions with photons)

32.80.Qk

34.50.Rk (Laser-modified scattering and reactions) 82.50.Nd (Control of photochemical reactions) 82.53.Kp (Coherent spectroscopy of atoms and molecules)

林峰, 张为, 赵泽宇, 丛书林 . Suppressing the weakly bound states in the photoassociation dynamics by a frequency cut-off laser pulse[J]. 中国物理B, 2012, 21(7): 73203-073203.

Lin Feng(林峰), Zhang Wei(张为), Zhao Ze-Yu(赵泽宇), and Cong Shu-Lin(丛书林) . Suppressing the weakly bound states in the photoassociation dynamics by a frequency cut-off laser pulse[J]. Chin. Phys. B, 2012, 21(7): 73203-073203.

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

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

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