Asymmetric Chiral Coupling in a Topological Resonator

Abstract

Chiral light-matter interactions supported by topological edge modes at the interface of valley photonic crystals provide a robust method to implement the unidirectional spin transfer. The valley topological photonic crystals possess a pair of counterpropagating edge modes. The edge modes are robust against the sharp bend of $60^{\circ }$ and $120^{\circ }$, which can form a resonator with whispering gallery modes. Here, we demonstrate the asymmetric emission of chiral coupling from single quantum dots in a topological resonator by tuning the coupling between a quantum emitter and a resonator mode. Under a magnetic field in Faraday configuration, the exciton state from a single quantum dot splits into two exciton spin states with opposite circularly polarized emissions due to Zeeman effect. Two branches of the quantum dot emissions couple to a resonator mode in different degrees, resulting in an asymmetric chiral emission. Without the demanding of site-control of quantum emitters for chiral quantum optics, an extra degree of freedom to tune the chiral contrast with a topological resonator could be useful for the development of on-chip integrated photonic circuits.

13 pages, 4 figures

References in corpus (27)

• Topological Photonics
• Spin-orbit interactions of light
• Chiral Quantum Optics
• Interfacing single photons and single quantum dots with photonic nanostructures
• Cavity-based quantum networks with single atoms and optical photons
• Transverse and longitudinal angular momenta of light
• Chiral nanophotonic waveguide interface based on spin-orbit coupling of light
• A topological quantum optics interface
• Deterministic photon-emitter coupling in chiral photonic circuits
• A Silicon-on-Insulator Slab for Topological Valley Transport
• Quantum Optics of Chiral Spin Networks
• Chirality of nanophotonic waveguide with embedded quantum emitter for unidirectional spin transfer
• Optical diode based on the chirality of guided photons
• Two-Dimensionally Confined Topological Edge States in Photonic Crystals
• Polarization engineering in photonic crystal waveguides for spin-photon entanglers
• Interfacing a quantum dot spin with a photonic circuit
• Chiral quantum optics using a topological resonator
• Quantum networks with chiral light--matter interaction in waveguides
• Spin-photon interface and spin-controlled photon switching in a nanobeam waveguide
• Experimental demonstration of topological slow light waveguides in valley photonic crystals
• A Semiconductor Topological Photonic Ring Resonator
• Topological cavity based on slow light topological edge mode for broadband Purcell enhancement
• Path-dependent initialization of a single quantum dot exciton spin in a nano-photonic waveguide
• Perfect Chirality with imperfect polarisation
• Position-dependent chiral coupling between single quantum dots and cross waveguides
• Probing the dark exciton states of a single quantum dot using photocurrent spectroscopy in magnetic fields
• Electron and hole g tensors of neutral and charged excitons in single quantum dots by high-resolution photocurrent spectroscopy