Fractal Polariton Topological Insulator
arXiv:2511.14542 · doi:10.1364/OL.574475
Abstract
We introduce higher order polariton topological insulator (HOTI) realized with fractal array of microcavity pillars arranged into Sierpinski gasket-like geometry. This system exhibiting self similarity in different generations, can support localized modes either in the external or multiple internal corners depending on the controllable distortion introduced into first generation structure. Nonlinear corner modes can be selectively excited in this dissipative system using resonant optical pumping. Strong polariton-polariton interactions lead to tilt of the resonance curves and bistability as the pump amplitude increases, allowing control over corner state profiles. Linear stability analysis illustrates dynamical stability of such states. Our results show how nontrivial topology manifests itself in self similar, aperiodic structures and indicate that fractal geometry may bring qualitatively new localization scenarios in polariton HOTIs.
To appear in Optics Letters
References in corpus (17)
- Topological Photonics
- Topological Photonics
- Exciton-polariton topological insulator
- Classical higher-order topological insulators
- Topological Polaritons
- Spin-orbit coupling and optical spin Hall effect in photonic graphene
- Photonic Floquet topological insulators in a fractal lattice
- Bistable topological insulator with exciton-polaritons
- Lieb polariton topological insulators
- Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases
- Nonlinear higher-order polariton topological insulator
- Observation of nonlinear fractal higher-order topological insulator
- Fractal-like photonic lattices and localized states arising from singular and nonsingular flatbands
- Non-Hermitian topological exciton-polariton corner modes
- Organic room-temperature polariton condensate in a higher-order topological lattice
- Polariton vortex Chern insulator
- Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates