Observation of photonic anomalous Floquet topological insulators
Friedrich Schiller University Jena
Abstract
Topological insulators are a new class of materials that exhibit robust and scatter-free transport along their edges - independently of the fine details of the system and of the edge - due to topological protection. To classify the topological character of two-dimensional systems without additional symmetries, one commonly uses Chern numbers, as their sum computed from all bands below a specific bandgap is equal to the net number of chiral edge modes traversing this gap. However, this is strictly valid only in settings with static Hamiltonians. The Chern numbers do not give a full characterization of the topological properties of periodically driven systems. In our work, we implement a system where chiral edge…
Citation impact
- FWCI
- 35.31
- Percentile
- 100%
- References
- 39
Authors
4Topics & keywords
- Topological insulator
- Floquet theory
- Winding number
- Topology (electrical circuits)
- Physics
- Chern class
- Symmetry protected topological order
- Topological order
- Sustainable cities and communities