文献类型：期刊文献

英文题名：Enhancement of Kerr nonlinearity completely without absorption

作者：Liang, Hong[1];Niu, Yueping[1];Deng, Li[1];Gong, Shangqing[1]

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

年份：2017

卷号：381

期号：48

起止页码：3978

外文期刊名：PHYSICS LETTERS A

收录：;EI(收录号：20202208737569);WOS:【SCI-EXPANDED(收录号:WOS:000416185200003)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 11474092), the key project of Shanghai Municipal Education Commission (Grant No. 14ZZ056), and Shanghai Natural Science Fund Project (Grant No. 14ZR1410300).

语种：英文

外文关键词：Kerr nonlinearity; Incoherent pumping; Gain; Doppler broadening

摘要：We investigate the enhancement of the Kerr nonlinearity in a four-level tripod-type atomic system completely without absorption. We study the effect of the incoherent pumping on the nonlinear susceptibility of the probe field and show that compared with that without the incoherent pumping, the Kerr nonlinearity can be enhanced with completely suppressed absorption at two different probe frequencies. Thus, we can get a symmetrical enhanced Kerr nonlinearity. Particularly, all of our results are in the case of Doppler broadening. (C) 2017 Elsevier B.V. All rights reserved.