Quantum Valley Hall Effect and Perfect Valley Filter Based on Photonic Analogs of Transitional Metal Dichalcogenides

Abstract

We consider theoretically staggered honeycomb lattices for photons which can be viewed as photonic analogs of transitional metal dichalcogenides (TMD) monolayers. We propose a simple realization of a photonic Quantum Valley Hall effect (QVHE) at the interface between two TMD analogs with opposite staggering on each side. This results in the formation of valley-polarized propagating modes whose existence relies on the difference between the valley Chern numbers, which is a ${\mathbb{Z}}_2$ topological invariant. We show that the magnitude of the photonic spin-orbit coupling based on the energy splitting between TE and TM photonic modes allows to control the number and propagation direction of these interface modes. Finally, we consider the interface between a staggered and a regular honeycomb lattice subject to a non-zero Zeeman field, therefore showing Quantum Anomalous Hall Effect (QAHE). In such a case, the topologically protected one-way modes of the QAHE become valley-polarized and the system behaves as a perfect valley filter.

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Cited by in corpus (18)

• Topological Photonics
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• Measuring the Quantum Geometric Tensor in 2D Photonic and Polaritonic Systems
• Active Valley-topological Plasmonic Crystal in Metagate-tuned Graphene
• Frequency-dependent topological phases and photonic detouring in valley photonic crystals
• Z_2 Photonic topological insulators in the visible wavelength range for robust nanoscale photonics
• Valley Hall phases in Kagome lattices
• ${\mathbb{Z}}_2$ topological insulator analog for vortices in an interacting bosonic quantum fluid
• Valley controlled propagation of pseudospin states in bulk metacrystal waveguides
• Chiral solitons in spinor polariton rings
• Berry curvature in monolayer MoS${}_2$ with broken mirror symmetry
• Valley-Chern Effect with LC-Resonators: A Modular Platform
• Mimicking graphene with polaritonic spin vortices
• Longitudinal and transverse mobilities of $n$-type monolayer transition metal dichalcogenides in the presence of proximity-induced interactions at low temperature
• Microcavity polaritons for topological photonics
• Dynamic Phase Enabled Topological Mode Steering in Composite Su-Schrieffer-Heeger Waveguide Arrays