Jeong Taek, Chough Young-Tak, Moon Han Seb
Opt Express. 2020 Nov 23;28(24):36611-36619. doi: 10.1364/OE.411990.
We report on the dynamic manipulation of light in a warm 87Rb atomic ensemble using light storage based on the atomic spin coherence arising from the electromagnetically induced transparency (EIT) and spontaneous four-wave mixing (FWM) processes. We demonstrate that, subsequent to the generation of atomic spin coherence between two hyperfine ground states via the EIT storage process, it is possible to control the delay time, direction, and optical frequency of the retrieved light according to the timing sequence and powers of the coupling, probe, and driving lasers used for atomic-spin-coherence generation and the spontaneous FWM process. We believe that our results provide useful ideas in photon frequency conversion and photon control in connection with the quantum memories that is essential in the quantum communications technology.
我们报告了在温暖的87Rb原子系综中利用基于电磁诱导透明（EIT）和自发四波混频（FWM）过程产生的原子自旋相干进行光存储来动态操控光。我们证明，通过EIT存储过程在两个超精细基态之间产生原子自旋相干后，根据用于产生原子自旋相干和自发FWM过程的耦合、探测和驱动激光的时序和功率，可以控制检索光的延迟时间、方向和光频率。我们相信，我们的结果为与量子通信技术中至关重要的量子存储器相关的光子频率转换和光子控制提供了有用的思路。
