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- Title
Multi-class, multi-functional design of photonic topological insulators by rational symmetry-indicators engineering.
- Authors
Luo, Jiachen; Du, Zongliang; Guo, Yilin; Liu, Chang; Zhang, Weisheng; Guo, Xu
- Abstract
An explicit topology optimization-based design paradigm is proposed for the design of photonic topological crystalline insulators (TCIs). To strictly guarantee the topological property, rational engineering of symmetry-indicators is carried out by mathematical programming, which simultaneously maximizes the width of nontrivial topological band gaps and achieves the desired quantized bulk polarization. Our approach is successfully applied to design photonic TCIs with time-reversal symmetry in two-dimensional point groups, higher-order magnetic TCIs, and higher-order photonic TCIs. This methodology paves the way for inverse design of optimized photonic/phononic, multiphysics, and multifunctional three-dimensional TCIs.
- Subjects
TOPOLOGICAL insulators; MATHEMATICAL programming; TOPOLOGICAL property; ENGINEERING; BAND gaps
- Publication
Nanophotonics (21928606), 2021, Vol 10, Issue 18, p4523
- ISSN
2192-8606
- Publication type
Article
- DOI
10.1515/nanoph-2021-0433