Six-wave mixing spectroscopy in a Doppler-broadened cascade four-level system
Six-wave mixing spectroscopy in a Doppler-broadened cascade four-level system
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DOI：
10.1088/0953-4075/42/17/175505
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
Jinyan Niu;Ru-quan Wang;B. Wang;Ling-An Wu;P. Fu
中科院分区：
文献类型：
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作者：
Jinyan Niu;Ru-quan Wang;B. Wang;Ling-An Wu;P. Fu
研究了多普勒展宽级联四能级系统中基于电磁感应透明的六波混频光谱。研究发现，由于不同速度原子的偏振干涉，慢波调制谱对入射光束的结构非常敏感，其线宽可以是无多普勒的，也可以是很宽的。这种偏振干涉可以在强耦合场的存在下得到控制。此外，SWM可以作为一种新型的无多普勒Autler-Townes（AT）光谱，它具有更好的光谱分辨率比传统的AT光谱。最后，通过研究SWM的时域对应关系，揭示了频域SWM光谱与时域光子回波之间的内在联系。
We study six-wave mixing (SWM) spectroscopy based on electromagnetically induced transparency in a Doppler-broadened cascade four-level system. It is found that the SWM spectra are extremely sensitive to the configuration of the incident beams, where the linewidth can be either Doppler-free or very broad, due to the polarization interference of atoms of different velocities. This polarization interference can be controlled in the presence of a strong coupling field. Moreover, SWM can be employed as a new type of Doppler-free Autler–Townes (AT) spectroscopy, which has better spectral resolution than conventional AT spectroscopy. Finally, we also reveal the intrinsic connection between frequency-domain SWM spectroscopy and time-domain photon echoes through studying the time-domain correspondence of SWM.