Optically reconfigurable higher-order valley photonic crystals based on enhanced Kerr effect

被引：5

作者：

Guo, Kai ^{[1
]}

Xue, Qingsong ^{[1
]}

Chen, Fujia ^{[1
]}

Zhou, Keya ^{[2
]}

Liu, Shutian ^{[2
]}

Guo, Zhongyi ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Comp & Informat, Hefei 230601, Peoples R China

[2] Harbin Inst Technol, Sch Phys, Harbin 150001, Peoples R China

来源：

OPTICS LETTERS | 2022年 / 47卷 / 15期

基金：

中国国家自然科学基金;

关键词：

TOPOLOGICAL STATES;

D O I：

10.1364/OL.468157

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The reconfigurable higher-order topological states are realized in valley photonic crystals with enhanced optical Kerr nonlinearity. The inversion symmetry of the designed valley photonic crystal is broken due to the difference in optical responses between adjacent elements rather than their geometry structures. Therefore, by constructing photonic crystals with distinct topological phases, valley-dependent topological states can be realized, and their reconfigurability is demonstrated based on the Kerr effect. The investigated higher-order topological photonic crystals exhibit great robustness against the structural defects and inferior quality of pump introduced around the corner. Our work provides a new, to the best of our knowledge, platform for studying optical field manipulation and optical devices fabrication in the context of nonlinear higher-order topology. (C) 2022 Optica Publishing Group

引用

页码：3828 / 3831

页数：4

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