Topological design of optical dirac-like cones by manipulating multiple local density of states
Optics & Laser Technology（2023）
摘要
•A gradient-free topological optimization framework to customize desired Dirac-like cones and extended problems.•Some novel photonic crystals with unprecedented performance are designed.•Pseudo-spin topological insulators with ultra-wide overlapping bandgap (26.95%) are designed.•Various wave manipulation capabilities of optimized photonic crystals are demonstrated.
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关键词
Photonic crystals,Dirac-like cone,Topological insulator,Topology optimization,Material-field series expansion,Local density of states
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