Tuning the Berry curvature in 2D Perovskite
arXiv:2007.14945 · doi:10.1038/s41565-021-00977-2
Abstract
Topological physics and in particular its connection with artificial gauge fields is a forefront topic in different physical systems, ranging from cold atoms to photonics and more recently semiconductor dressed exciton-photon states, called polaritons. Engineering the energy dispersion of polaritons in microcavities through nanofabrication or exploiting the intrinsic material and cavity anisotropies has demonstrated many intriguing effects related to topology and emergent gauge fields. Here, we show that we can control the Berry curvature distribution of polariton bands in a strongly coupled organic-inorganic 2D perovskite single crystal. The spatial anisotropy of the perovskite crystal combined with photonic spin-orbit coupling make emerge two Hamilton's diabolical points in the dispersion. The application of an external magnetic field breaks time reversal symmetry thanks to the exciton Zeeman splitting. It splits the diabolical points degeneracy. The resulting bands show non-zero integral Berry curvature which we directly measure by state tomography. Crucially, we show that we can control the Berry curvature distribution in the band, the so-called band geometry, within the same microcavity.
30 pages, 10 figures
References in corpus (31)
- Topological Photonics
- Topological Photonics
- Analogs of quantum Hall effect edge states in photonic crystals
- Light-induced gauge fields for ultracold atoms
- Gauge fields in graphene
- Topological Quantum Matter with Ultracold Gases in Optical Lattices
- Superfluidity in topologically nontrivial flat bands
- Observation of non-Hermitian degeneracies in a chaotic exciton-polariton billiard
- Exciton-polariton topological insulator
- Direct observation of Dirac cones and a flatband in a honeycomb lattice for polaritons
- Topological Phases in Two-Dimensional Materials: A Brief Review
- Topological Polaritons
- Polariton Topological Insulator
- Direct measurement of the quantum geometric tensor in a two-dimensional continuous medium
- Artificial gauge fields in materials and engineered systems
- Topological Polaritons and Excitons in Garden Variety Systems
- Two-Dimensional hybrid perovskites sustaining strong polariton interactions at room temperature
- Geometric orbital susceptibility: quantum metric without Berry curvature
- Stable biexcitons in two-dimensional metal-halide perovskites with strong dynamic lattice disorder
- Orbital edge states in a photonic honeycomb lattice
- Twist of generalized skyrmions and spin vortices in a polariton superfluid
- Measuring the Quantum Geometric Tensor in 2D Photonic and Polaritonic Systems
- Observation of two thresholds leading to polariton condensation in 2D hybrid perovskites
- Electrically tunable artificial gauge potential for polaritons
- Semi-Dirac Transport and Anisotropic Localization in Polariton Honeycomb Lattices
- Room-Temperature Exciton-Polariton Condensation in a Tunable Zero-Dimensional Microcavity
- Observation of Exciton Polariton Condensation in a Perovskite Lattice at Room Temperature
- Introduction to the physics of artificial gauge fields
- Chromodynamics of photons in an artificial non-Abelian magnetic Yang-Mills field
- Nontrivial band geometry in an optically active system
- Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard
Cited by in corpus (23)
- Roadmap on structured waves
- Electrically tunable Berry curvature and strong light-matter coupling in birefringent perovskite microcavities at room temperature
- Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature
- Electrically pumped polarized exciton-polaritons in a halide perovskite microcavity
- Electrical switching of a chiral lasing from polariton condensate in a Rashba-Dresselhaus regime
- Generalized Quantum Geometric Tensor in a Non-Hermitian Exciton-Polariton System
- Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling
- Berry Curvature Signatures in Chiroptical Excitonic Transitions
- Time Translation Symmetry Breaking in an Isolated Spin-Orbit-Coupled Fluid of Light
- Non-Hermitian polariton-photon coupling in a perovskite open microcavity
- Tutorial: From Topology to Hall Effects -- Implications of Berry Phase Physics
- Magneto-Optics of Anisotropic Exciton Polaritons in Two-Dimensional Perovskites
- Molecular and solid-state topological polaritons induced by population imbalance
- Coupled quantum vortex kinematics and Berry curvature in real space
- Engineering Dion-Jacobson Perovskites in Polariton Waveguides
- Direct Measurement of a Non-Hermitian Topological Invariant in a Hybrid Light-Matter System
- Polariton Chern Bands in 2D Photonic Crystals Beyond Dirac Cones
- Breakdown of Bulk-Radiation Correspondence in Radiative Photonic Lattices
- Topological photonics in nanoscaled systems with far field radiation and polarization singularities
- Room-temperature polariton condensate in a two-dimensional hybrid perovskite
- In-situ tunneling control in photonic potentials by Rashba-Dresselhaus spin-orbit coupling
- Tilting flat bands in an empty microcavity
- Exceptional rings in nonlinear non-Hermitian planar optical microcavities: implementation, signal enhancement, and topology