文献类型：期刊文献

英文题名：Low light level all-optical switching in a four-level atom-cavity system

作者：Duan, Yafan[1];Lin, Gongwei[1];Zhang, Shicheng[1];Niu, Yueping[1];Gong, Shangqing[1]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2016

卷号：358

起止页码：73

外文期刊名：OPTICS COMMUNICATIONS

收录：;EI(收录号：20153801292067);WOS:【SCI-EXPANDED(收录号:WOS:000363046100011)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant nos. 61405059, 91321101, 11274112, and 11204080) and the Fundamental Research Funds for the Central Universities (Grant no. WM1313003).

语种：英文

外文关键词：All optical switching; Coherence; The atom-cavity system; EIT

摘要：We report on an all-optical switching in a double A four-level atom-cavity system both theoretically and experimentally. In this system, an extra coherence between two ground states is induced by two coupling lasers, thus the loss of the cavity field decreases. Then, we can use one weak field to control another weak field at low light levels. Compared to the three-level atom-cavity system, the power of the switching laser can be much weaker in the four-level atom-cavity system. (C) 2015 Elsevier B.V. All rights reserved.