Topological edge states of nonequilibrium polaritons in hollow honeycomb arrays

Abstract

We address topological currents in polariton condensates excited by uniform resonant pumps in finite honeycomb arrays of microcavity pillars with a hole in the center. Such currents arise under combined action of the spin-orbit coupling and the Zeeman splitting that break the time-reversal symmetry and open a topological gap in the spectrum of the structure. The most representative feature of this structure is the presence of two interfaces, inner and outer ones, where the directions of topological currents are opposite. Due to the finite size of the structure polariton-polariton interactions lead to the coupling of the edge states at the inner and outer interfaces, which depends on the size of the hollow region. Moreover, switching between currents can be realized by tuning the pump frequency. We illustrate that currents in this finite structure can be stable and study bistability effects arising due to the resonant character of the pump.

References in corpus (28)

• Topological Insulators
• Topological insulators and superconductors
• Topological Photonics
• Topological Photonics
• Photonic Floquet Topological Insulators
• Possible Realization of Directional Optical Waveguides in Photonic Crystals with Broken Time-Reversal Symmetry
• Floquet Topological Insulator in Semiconductor Quantum Wells
• Robust optical delay lines via topological protection
• Lasing in topological edge states of a 1D lattice
• Nonlinear topological photonics
• Exciton-polariton topological insulator
• Edge Solitons in Nonlinear Photonic Topological Insulators
• Observation of Topological Band Gap Solitons
• Topological Polaritons
• Polariton $\mathbb{Z}$ Topological Insulator
• Engineering spin-orbit coupling for photons and polaritons in microstructures
• Fractional quantum Hall states of photons in an array of dissipative coupled cavities
• Exciton Polaritons in a Two-Dimensional Lieb Lattice with Spin-Orbit Coupling
• Topological Polaritons and Excitons in Garden Variety Systems
• Chiral Bogoliubons in Nonlinear Bosonic Systems
• Bistable topological insulator with exciton-polaritons
• Exploring nonlinear topological states of matter with exciton-polaritons: Edge solitons in kagome lattice
• Realization of all-optical vortex switching in exciton-polariton condensates
• Lieb polariton topological insulators
• Interacting quantum fluid in a polariton topological insulator
• Coupling between Exciton-Polariton Corner Modes through Edge States
• Vector Topological Edge Solitons in Floquet Insulators
• Kagome Lattice from Exciton-Polariton Perspective

Cited by in corpus (5)

• From the topological spin-Hall effect to the non-Hermitian skin effect in an elliptical micropillar chain
• Optically induced topological spin-valley Hall effect for exciton polaritons
• Observation of nonlinearity-controlled switching of topological edge states
• Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates
• Topological edge states in curved zigzag superlattices in nonlinear exciton-polaritons