Nontrivial band geometry in an optically active system
arXiv:1912.05994
Abstract
Optical activity (OA), also called circular birefringence, is known for two hundred years, but its applications for topological photonics remain unexplored. Unlike the Faraday effect, OA provokes rotation of the linear polarization of light without magnetic effects, thus preserving the time-reversal symmetry. Here, we report a direct measurement of the Berry curvature and quantum metric of the photonic modes of a planar cavity containing an optically active organic microcrystal (perylene). Photonic spin-orbit-coupling induced by the cavity results in the action of a non-Abelian gauge field on photons. The addition of high OA makes emerge geometrically non-trivial bands containing two gapped Dirac cones with opposite topological charges. This experiment performed at room temperature and at visible wavelength establishes the potential of optically active organic materials for implementing non-magnetic and low-cost topological photonic devices.
References in corpus (15)
- Topological Insulators
- 2D materials and van der Waals heterostructures
- Possible Realization of Directional Optical Waveguides in Photonic Crystals with Broken Time-Reversal Symmetry
- The Valley Hall Effect in MoS2 Transistors
- Imaging topological edge states in silicon photonics
- Mixed-Dimensional van der Waals Heterostructures
- Lasing in topological edge states of a 1D lattice
- A topological quantum optics interface
- Exciton-polariton topological insulator
- A topological source of quantum light
- Spin-orbit coupling and optical spin Hall effect in photonic graphene
- Non-Abelian Gauge Fields in Photonic Cavities and Photonic Superfluids
- Spin Textures of Polariton Condensates in a Tunable Microcavity with Strong Spin-Orbit Interaction
- Effective Theory of Non-Adiabatic Quantum Evolution Based on the Quantum Geometric Tensor
- Optical activity of quantum wells