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Efficient Preparation of D2 Molecules in v=2 by Stimulated Raman Pumping
Tian-gang Yang,Long Huang,Tao Wang,Chun-lei Xiao*,Dong-xu Dai,Xue-ming Yang*
Author NameAffiliationE-mail
Tian-gang Yang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;School of Physics and Optoelectric Engineering, Dalian University of Technology, Dalian 116024, China  
Long Huang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;University of Chinese Academy of Sciences, Beijing 100049, China  
Tao Wang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Chun-lei Xiao* State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China chunleixiao@dicp.ac.cn 
Dong-xu Dai State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Xue-ming Yang* State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China xmyang@dicp.ac.cn 
Abstract:
We report the preparation of D2 molecules in v=2 level in molecular beam condition. A single longitudinal mode laser system was used for excitation of D2 from (v=0, j=0) to (v=2, j=0) with the scheme of stimulated Raman pumping. An excitation efficiency of 25.2% has been achieved, which was determined by the scheme of resonance-enhanced multiphoton ionization. Dependence of relative excitation efficiency on laser energy has been measured. We found that the increasing rate of excitation efficiency became slower as pulse energy of Stokes laser increase, while the excitation efficiency still increases approximately linearly with pump pulse energies up to 60 mJ. The spectral line shapes of Raman transition was also measured at different laser energies and considerable dynamical Stark effect was observed. A single peak was found on the three dimension surface of relative excitation efficiency, indicating the process occurred in the present study is a process of stimulated Raman pumping instead of stimulated adiabatic Raman passage.
Key words:  Stimulated Raman pumping  D2  Vibrational excitation  Molecular beam
FundProject:This work was supported by the National Natural Science Foundation of China (No.21573226 and No.21503206), Chinese Academy of Sciences (No.XDB17010100)
用受激拉曼泵浦方法高效制备v=2振动激发态氘分子
杨天罡,黄龙,汪涛,肖春雷*,戴东旭,杨学明*
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DOI:10.1063/1674-0068/30/cjcp1711221
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