Theory of quantum spin-Hall topological lasers
arXiv:2509.20920 · doi:10.1103/mm8x-wc7p
Abstract
We theoretically investigate a quantum spin-Hall topological laser formed by an array of dielectric ring resonators endowed of saturable gain. The system preserves time-reversal symmetry, the clockwise and counter-clockwise modes in each ring resonator acting as two pseudospin states that experience opposite synthetic magnetic fields. We consider ring resonators featuring an internal S-shaped waveguide asymmetrically coupling the two pseudospin states. In spite of the non-magnetic nature of the configuration, we show that an effective breaking of reciprocity is induced by the interplay of spatial parity breaking with saturable gain and a Kerr optical non-linearity. This enables robust single-mode topological lasing even in the presence of realistic levels of backscattering.
17 pages, 14 figures
References in corpus (25)
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Topological Photonics
- Topological Photonics
- Classification of topological insulators and superconductors in three spatial dimensions
- Photonic Floquet Topological Insulators
- Classification of topological quantum matter with symmetries
- Possible Realization of Directional Optical Waveguides in Photonic Crystals with Broken Time-Reversal Symmetry
- Topological insulators and superconductors: ten-fold way and dimensional hierarchy
- Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
- Periodic table for topological insulators and superconductors
- Imaging topological edge states in silicon photonics
- Higher-Order Topological Insulators
- Robust optical delay lines via topological protection
- Lasing in topological edge states of a 1D lattice
- Active topological photonics
- Bistable topological insulator with exciton-polaritons
- Theory of the coherence of topological lasers
- Theory of chiral edge state lasing in a two-dimensional topological system
- Nonlinearity-induced reciprocity breaking in a single non-magnetic Taiji resonator
- Unidirectional lasing in nonlinear Taiji micro-ring resonators
- Single-mode lasing based on PT-breaking of two-dimensional photonic higher-order topological insulator
- A hybrid single quantum dot coupled cavity on a CMOS-compatible SiC photonic chip for Purcell-enhanced deterministic single-photon emission
- Linearized theory of the fluctuation dynamics in 2D topological lasers
- Optical isolators based on non-reciprocal four-wave mixing