Gapless Unidirectional Photonic Transport Using All-Dielectric Kagome Lattices

Abstract

Photonic topological insulators are a promising photonic platform due to the possibility of unidirectional edge states with insensitivity to bending, fabrication imperfections or environmental fluctuation. Here we demonstrate highly efficient unidirectional photonic edge mode propagation facilitated by an optical analogue of the quantum valley Hall effect. With an all-dielectric kagome lattice design, we demonstrate broadband suppressed reflection in the presence of sharp corners and further show negligible vertical losses in a semiconductor-based device at telecommunication wavelengths.

9 pages, 13 figures

References in corpus (22)

• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Topological Photonics
• Photonic Floquet Topological Insulators
• Possible Realization of Directional Optical Waveguides in Photonic Crystals with Broken Time-Reversal Symmetry
• Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
• Chiral Quantum Optics
• Scheme to Achieve Silicon Topological Photonics
• Robust optical delay lines via topological protection
• All-Si Valley-Hall Photonic Topological Insulator
• A Silicon-on-Insulator Slab for Topological Valley Transport
• Topologically-protected refraction of robust kink states in valley photonic crystals
• Visualization of unidirectional optical waveguide using topological photonic crystals made of dielectric material
• Valley-protected backscattering suppression in silicon photonic graphene
• Valley-contrasting orbital angular momentum in photonic valley crystals
• Edge waves in plates with resonators: An elastic analogue of the quantum valley Hall effect
• Pseudospin-valley coupled edge states in a photonic topological insulator
• Tunable light flow control in valley photonic crystal waveguide
• Elastic quantum spin-Hall effect in Kagome lattices
• Theory and Experimental Investigation of the Quantum Valley Hall Effect
• Experimental evidence of robust acoustic valley Hall edge states in a non-resonant topological elastic waveguide
• Quantum Valley Hall Effect and Perfect Valley Filter Based on Photonic Analogs of Transitional Metal Dichalcogenides
• A group theoretical route to deterministic Weyl points in chiral photonic lattices

Cited by in corpus (14)

• A brief review of topological photonics in one, two, and three dimensions
• The Nature of Topological Protection in Spin and Valley Hall Insulators
• Higher-order topology in plasmonic kagome lattices
• Evolution of topological edge modes from honeycomb photonic crystals to triangular-lattice photonic crystals
• Multifrequency and multimode topological waveguides in a Stampfli-triangle photonic crystal with large valley Chern numbers
• Hybrid topological guiding mechanisms for photonic crystal fibers
• Non-Abelian charged nodal links in dielectric photonic crystal
• Tunable three-way valley Hall energy-splitter: venturing beyond graphene-like structures
• Topological Bulk Lasing Modes Using an Imaginary Gauge Field
• Near- and Far-Field Excitation of Topological Plasmonic Metasurfaces
• All-optical control of topological valley transport in graphene metasurfaces
• Modelling spatio-temporal dynamics of chiral coupling of quantum emitters to light fields in nanophotonic structures
• Topological Pseudospin Hall Effect and Multi-frequency Corner Modes in Kagome-based Lattices
• Topological transitions induced by cavity-mediated interactions in photonic valley-Hall metasurfaces