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arXiv 1303.1897physics.optics
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开放V型分子系统中电磁诱导透明与Autler-Townes分裂的交叉

Crossover from Electromagnetically Induced Transparency to Autler-Townes Splitting in Open V-Type Molecular Systems

Chengjie Zhu, Chaohua Tan, Guoxiang Huang

摘要:

研究了V型开放分子系统的电磁诱导透明和Autler-Townes分裂。利用留数定理和谱分解对探测光场的吸收谱进行了详细的解析计算,发现热分子可能发生EIT,并且存在EIT到ATS的交叉(即EIT-ATS交叉)。然而,没有EIT,因此对于冷分子没有EIT-ATS交叉。此外,我们证明,热分子EIT是允许的,即使是对传播配置。给出了热分子在同向传播和反向传播两种构型下EIT条件和探测场EIT透明窗口宽度的显式表达式。我们的理论结果与Lazoudis等人[Phys. Rev. A 83,063419(2011)]最近报道的实验结果吻合得很好。

英文摘要:

We investigate electromagnetically induced transparency (EIT) and Autler-Townes splitting(ATS) in an open V-type molecular system. Through detailed analytical calculations on the absorption spectrum of probe laser field by using residue theorem and spectrum decomposition, we find that EIT may occur and there exists a crossover from EIT to ATS (i.e. EIT-ATS crossover) for hot molecules. However, there is no EIT and hence no EIT-ATS crossover for cold molecules. Furthermore, we prove that for hot molecules EIT is allowed even for a counter-propagating configuration. We provide explicit formulas of EIT conditions and widths of EIT transparency windows of probe field when hot molecules work in co-propagating and counter-propagating configurations, respectively. Our theoretical result agrees well with the recent experimental one reported by Lazoudis et al. [Phys. Rev. A 83, 063419 (2011)].

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