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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*
作者单位E-mail
杨天罡 中国科学院大连化学物理研究所, 分子反应动力学国家重点实验室, 大连 116023;大连理工大学物理与光电工程学院, 大连 116024  
黄龙 中国科学院大连化学物理研究所, 分子反应动力学国家重点实验室, 大连 116023;中国科学院大学, 北京 100046  
汪涛 中国科学院大连化学物理研究所, 分子反应动力学国家重点实验室, 大连 116023  
肖春雷* 中国科学院大连化学物理研究所, 分子反应动力学国家重点实验室, 大连 116023 chunleixiao@dicp.ac.cn 
戴东旭 中国科学院大连化学物理研究所, 分子反应动力学国家重点实验室, 大连 116023  
杨学明* 中国科学院大连化学物理研究所, 分子反应动力学国家重点实验室, 大连 116023 xmyang@dicp.ac.cn 
摘要:
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DOI:10.1063/1674-0068/30/cjcp1711221
分类号:
基金项目:This work was supported by the National Natural Science Foundation of China (No.21573226 and No.21503206), Chinese Academy of Sciences (No.XDB17010100)
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*
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