Theoretical analysis on two-photon absorption spectroscopy in a confined four-level atomic system
Theoretical analysis on two-photon absorption spectroscopy in a confined four-level atomic system
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受限四能级原子系统双光子吸收光谱的理论分析
DOI：
10.3788/col20090707.0640
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发表时间：
2009-07
影响因子：
3.5
通讯作者：
中科院分区：
文献类型：
--
作者：
本文从理论上研究了受限Y型四能级系统中控制场对双光子吸收光谱的影响。由于慢原子的贡献增强，在双光子吸收谱线和透射率相对于双光子吸收的下降中均存在Dicke窄化效应。通过改变控制场的强度和三个激光场的失谐量，可以改变双光子吸收的抑制和增强。这种对双光子吸收的控制可能在信息处理和光学器件中有一些应用。
We investigate theoretically two-photon absorption spectroscopy modified by a control field in a confined Y-type four-level system. Dicke-narrowing effect occurs both in two-photon absorption lines and the dips of transparency against two-photon absorption due to enhanced contribution of slow atoms. We also find that the suppression and the enhancement of two-photon absorption can be modified by changing the strength of the control field and the detuning of three laser fields. This control of two-photon absorption may have some applications in information processing and optical devices.