Inverse design of higher-order photonic topological insulators

Abstract

Topological photonics revolutionizes some of the traditional approaches to light propagation and manipulation, and it provides unprecedented means for developing novel photonic devices. Recently discovered higher-order topological phases go beyond the conventional bulk-edge correspondence for photonic crystals and introduce novel opportunities for topological protection. Here, we introduce an intelligent numerical approach for inverse design of higher-order photonic topological insulators with great flexibility for controlling both topological edge and topological corner states. In particular, we consider the second-order photonic topological insulator and design several structures supporting both edge and corner states at different frequencies. By carefully programming these structures, we suggest a novel approach for topological routing of the edge and corner states by changing the operational frequency. Our finding paves the way to integrated topological photonic devices with novel functionalities.

arXiv comment12 pages, 5 figures

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Cited by in corpus (9)

• Coupled cavity-waveguide system based on topological corner state and edge state
• Dual-Polarization Second-Order Photonic Topological Insulators
• Topologically protected second-harmonic generation via doubly resonant high-order photonic modes
• Corner modes of the breathing kagome lattice: origin and robustness
• Efficient Design of Helical Higher-Order Topological Insulators in 3D Elastic Medium
• Density of photonic states in aperiodic structures
• Optimal design of fast topological pumping
• Floquet topological phases with time-reversal and space inversion symmetries and dynamical detection of topological charges
• Constructing qubit edge states by inverse-designing the electromagnetic environment