Line Shape Analysis of Ultracold Heteronuclear Molecular Photoassociation Spectroscopy by Resonance-Enhanced Two-Photon Ionization
Line Shape Analysis of Ultracold Heteronuclear Molecular Photoassociation Spectroscopy by Resonance-Enhanced Two-Photon Ionization
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DOI：
10.7566/jpsj.82.084301
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发表时间：
2013-07
影响因子：
1.7
通讯作者：
Jinpeng Yuan;Zhonghua Ji;Yanting Zhao;Yan Yang;Yonggang Yang;Liantuan Xiao;Suotang Jia
中科院分区：
文献类型：
--
作者：
Jinpeng Yuan;Zhonghua Ji;Yanting Zhao;Yan Yang;Yonggang Yang;Liantuan Xiao;Suotang Jia
共振增强双光子电离（RETPI）是超冷分子光缔合光谱测量的有力工具。利用RETPI系统地测量和分析了不同光缔合激光强度和电离激光能量下超冷RbCs分子光缔合光谱的强度和半峰全宽。在高电离激光能量下观察到光缔合光谱的饱和现象，在高光缔合激光强度下观察到抑制现象。由光缔合光谱的线形导出了RbCs分子光缔合的饱和强度、零光缔合激光强度下不同振转能级激发态分子的线宽和双光子电离效率。光缔合光谱的线形分析对于精确的光谱分析具有重要意义。
Resonance-enhanced two-photon ionization (RETPI) is a powerful tool in ultracold molecular photoassociation spectroscopy measurement. Using the RETPI, the line shape of ultracold RbCs molecular photoassociation spectroscopy, which contains intensity and full width at half maximum, is measured and analyzed systematically with varied photoassociation laser intensity and ionization laser energy. The saturation of photoassociation spectroscopy at a high ionization laser energy is observed and the suppression phenomenon is observed at high photoassociation laser intensity. The saturation intensity of RbCs molecular photoassociation, the linewidths of excited state molecules in different rovibrational levels at zero photoassociation laser intensity, and two-photon ionization efficiency have been derived from the line shape of photoassociation spectroscopy. The line shape analysis of photoassociation spectroscopy is important for precision spectroscopic analysis.