文献类型：期刊文献

英文题名：Classical simulation of coherent population return in coupled optical waveguides

作者：Naim, Nida[1];Deng, Li[1];Qian, Jun[1];Niu, Yueping[1];Gong, Shangqing[1]

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

年份：2022

卷号：69

期号：8

起止页码：467

外文期刊名：JOURNAL OF MODERN OPTICS

收录：;EI(收录号：20221111776083);WOS:【SCI-EXPANDED(收录号:WOS:000764935200001)】；

基金：This work was supported by National Natural Science Foundation of China [grant numbers 11774089, 11774362, 11974109, 12034007].

语种：英文

外文关键词：Optical analogue; coherent population return; optical waveguide; adiabatic passage; beam splitter

摘要：An optical analog to coherent population return (CPR) is carried out in two evanescently coupled waveguides. Thepropagation constants of the two waveguides are different and the coupling between them is slowly varied for the adiabatic condition.The analog to the CPR corresponds to complete light return. Furthermore, we simulate two extensions of the CPR. One is that thecoupling is unchanged after it reaches its maximum, while the another one is that the coupling is replaced by a sudden decrease fromthe maximum to zero (half-CPR). We can both observe nearly 50:50 beam splitting in the two extensions. However, the half-CPRperforms better, which implies its application for achromatic beam splitters. Finally, we note that the waveguide structure proposedhere for beam splitters is simpler than those based on the stimulated Raman adiabatic passage and the rapid adiabatic passage.