Optical Precursor with Four-Wave Mixing and Storage Based on a Cold-Atom Ensemble

被引:7
作者
Ding, Dong-Sheng [1 ,2 ]
Jiang, Yun Kun [3 ]
Zhang, Wei [1 ,2 ]
Zhou, Zhi-Yuan [1 ,2 ]
Shi, Bao-Sen [1 ,2 ]
Guo, Guang-Can [1 ,2 ]
机构
[1] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum, Hefei 230026, Anhui, Peoples R China
[3] Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350002, Peoples R China
基金
中国国家自然科学基金;
关键词
DISPERSING MEDIA; PROPAGATION; GENERATION; LIGHT;
D O I
10.1103/PhysRevLett.114.093601
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We observed optical precursors in four-wave mixing based on a cold-atom gas. Optical precursors appear at the edges of pulses of the generated optical field, and propagate through the atomic medium without absorption. Theoretical analysis suggests that these precursors correspond to high-frequency components of the signal pulse, which means the atoms cannot respond quickly to rapid changes in the electromagnetic field. In contrast, the low-frequency signal components are absorbed by the atoms during transmission. We also showed experimentally that the backward precursor can be stored using a Raman transition of the atomic ensemble and retrieved later.
引用
收藏
页数:4
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