Discrete Talbot effect in modulated lattices with PT symmetric perturbations

被引：5

作者：

Kang, Xinyue ^{[1
]}

Wang, Hao ^{[1
]}

Dou, Lichao ^{[1
]}

Chen, Qixuan ^{[1
]}

Zhang, Qian ^{[1
]}

Zhao, Tingjun ^{[1
]}

Zhan, Kaiyun ^{[1
]}

机构：

[1] China Univ Petr East China, Coll Sci, Qingdao 266580, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2023年 / 40卷 / 04期

基金：

中国国家自然科学基金;

关键词：

FIELD;

D O I：

10.1364/JOSAB.484961

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate both theoretically and numerically that the periodic self-imaging phenomenon of light patterns with certain input periods can be effectively realized in a three-layered optical lattice with parity-time symmetric modulations, which can introduce a modulation phase to the lattice structure. By varying the ratio of coupling coef-ficients, the Talbot distance can be engineered, which can be further tuned by adjusting the modulation phase. The Talbot effect occurs only if the modulation phase belongs to a specific set: {+/-pi/3, +/-pi /2, +/- 2 pi /3, +/-pi}. (c) 2023 Optica Publishing Group

引用

页码：856 / 861

页数：6

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