Tuning the phase sensitivity of a double-lambda system with a static magnetic field.
Tuning the phase sensitivity of a double-lambda system with a static magnetic field.
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DOI：
10.1364/oe.21.011705
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发表时间：
2013-04
期刊：
影响因子：
3.8
通讯作者：
Xiwei Xu;S. Shen;Yanhong Xiao
中科院分区：
文献类型：
--
作者：
Xiwei Xu;S. Shen;Yanhong Xiao
本文研究了直流磁场对由两个激光场、一个探测场和一个泵浦场耦合的双λ系统的相位灵敏度的影响。结果表明，探针的增益和折射率既可以由磁场控制，也可以由两个激光场之间的相对相位控制。更有趣的是，当系统简化为单λ系统时，打开磁场将系统从相位不敏感过程转变为相位敏感过程。在脉冲探测机制中，当磁场或相对相位被调整时，我们观察到慢光和快光之间的切换。使用涂层87Rb蒸汽电池的实验产生的结果与我们的数值模拟吻合良好。这一工作提供了一种新的和简单的手段来操纵相敏电磁感应透明或四波混频，并可能是有用的应用在量子光学，非线性光学和磁强计基于这样的系统。
We study the effect of a DC magnetic field on the phase sensitivity of a double-lambda system coupled by two laser fields, a probe and a pump. It is demonstrated that the gain and the refractive index of the probe can be controlled by either the magnetic field or the relative phase between the two laser fields. More interestingly, when the system reduces to a single-lambda system, turning on the magnetic field transforms the system from a phase-insensitive process to a phase-sensitive one. In the pulsed-probe regime, we observed switching between slow and fast light when the magnetic field or the relative phase was adjusted. Experiments using a coated 87Rb vapor cell produced results in good agreement with our numerical simulation. This work provides a novel and simple means to manipulate phase sensitive electromagnetically-induced-transparency or four-wave mixing, and could be useful for applications in quantum optics, nonlinear optics and magnetometery based on such systems.