Dark Raman resonances due to Ramsey interference in vacuum vapor cells
Dark Raman resonances due to Ramsey interference in vacuum vapor cells
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真空蒸汽室中拉姆齐干扰引起的暗拉曼共振
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
B. Jelenković
中科院分区：
文献类型：
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作者：
Z. Grujić;M. Mijailović;D. Arsenovic;A. Kovačević;M. Nikolic;B. Jelenković
在采用Hanle组态的RB蒸汽室中，研究了泵浦激光和探测激光之间的塞曼子能级之间的原子相干性的演化。置于空心泵浦光束内部的探测光束的传输表明，拉姆齐条纹使Hanle共振(外磁场B=0)变窄，而拉姆齐条纹与中心峰的距离取决于光束之间的距离。从探测透射谱随各光束线偏振夹角增大的变化可以看出，泵浦诱导取向的时间演化是显而易见的。实验结果与通过求解含时光学Bloch方程计算原子从进入泵浦光束到离开探测光束的时间的探测荧光的模型的结果是一致的。总激发态布居数的结果在原子速度分布上是平均的。
We investigate the evolution of the atomic coherence between Zeeman sublevels with $ensuremath{Delta}{m}_{F}=2$ in the region between pump and probe laser beams, in a Rb vapor cell using the Hanle configuration. The transmission of the probe beam, placed inside the hollow pump beam, shows the narrowing of the Hanle resonance (at external magnetic field $B=0$) by Ramsey fringes whose separation from the central peak depends on the distance between the beams. The temporal evolution of the pump induced alignment is evident from the changes of the probe transmission spectra with increasing the angle between linear polarizations of each beam. Experimental results are in agreement with the results of the model which calculates probe fluorescence by solving time-dependent optical Bloch equations, from the time when atom enters the pump beam to the time when it leaves the probe beam. The results for total excited state populations were averaged over atomic velocities distribution.