Optical precursor with four-wave mixing and storage based on a cold-atom ensemble

Physical Review Letters
Dong-Sheng DingGuang-Can Guo

Abstract

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.

References

Jun 1, 2004·Physical Review Letters·Seung-Ho Choi, Ulf Osterberg
Dec 13, 2007·Optics Letters·A J MerriamS E Harris
Sep 17, 2008·Optics Letters·Shengwang DuS E Harris
Oct 2, 2009·Physical Review Letters·Dong WeiShengwang Du
Sep 28, 2010·Physical Review Letters·J F ChenShengwang Du
Jul 21, 2011·Physical Review Letters·Shanchao ZhangShengwang Du
Feb 24, 2015·Physical Review Letters·Dong-Sheng DingGuang-Can Guo

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Citations

Jul 26, 2016·Physical Review Letters·Yue-Yue ChenChengpu Liu

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