Optical Thouless pumping transport and nonlinear switching in a topological low-dimensional discrete nematic liquid crystal array
Optical Thouless pumping transport and nonlinear switching in a topological low-dimensional discrete nematic liquid crystal array
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DOI：
10.1103/physreva.105.013513
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发表时间：
2022-01-12
影响因子：
2.9
通讯作者：
Christodoulides, Demetrios N.
中科院分区：
文献类型：
--
作者：
Jung, Pawel S.;Parto, Midya;Christodoulides, Demetrios N.
我们从理论上研究了一个无泵浦方案在一维拓扑的Su-SchriffeHeeger（SSH）模型的单带隙和多带隙系统时，实施在一个离散的液晶排列。对于电控SSH波导阵列，我们数值模拟了低功率下的边到边光传输。另一方面，在更高的功率下，光诱导的非线性缺陷态会阻碍传输，从而产生鲁棒的全光开关。
We theoretically investigate a Thouless pumping scheme in the one-dimensional topological Su-SchriefferHeeger (SSH) model for single and multiple band-gap systems when implemented in a discrete nematic liquid crystal arrangement. For an electrically controlled SSH waveguide array, we numerically demonstrate edge-toedge light transport at low power levels. On the other hand, at higher powers, the transport is frustrated by light-induced nonlinear defect states, giving rise to robust all-optical switching.