Observing 0D subwavelength-localized modes at ~100 THz protected by weak topology
arXiv:2202.12528 · doi:10.1126/sciadv.abl3903
Abstract
Topological photonic crystals (TPhCs) provide robust manipulation of light with built-in immunity to fabrication tolerances and disorder. Recently, it was shown that TPhCs based on weak topology with a dislocation inherit this robustness and further host topologically protected lower-dimensional localized modes. However, TPhCs with weak topology at optical frequencies have not been demonstrated so far. Here, we use scattering-type scanning near field optical microscopy to verify mid-bandgap zero-dimensional light localization close to 100 THz in a TPhC with nontrivial Zak phase and an edge dislocation. We show that due to the weak topology, differently extended dislocation centers induce similarly strong light localization. The experimental results are supported by full-field simulations. Along with the underlying fundamental physics, our results lay a foundation for the application of TPhCs based on weak topology in active topological nanophotonics, and nonlinear and quantum optic integrated devices due to their strong and robust light localization.
References in corpus (27)
- Topological Photonics
- Topological Photonics
- Quantum nature of a strongly-coupled single quantum dot-cavity system
- Robust optical delay lines via topological protection
- Analogs of quantum Hall effect edge states in photonic crystals
- Direct Measurement of the Zak phase in Topological Bloch Bands
- A topological quantum optics interface
- Topologically Enabled Ultra-high-Q Guided Resonances Robust to Out-of-plane Scattering
- A Silicon-on-Insulator Slab for Topological Valley Transport
- Demonstration of conditional gate operation using superconducting charge qubits
- Direct observation of corner states in second-order topological photonic crystal slabs
- Topological protection of photonic mid-gap cavity modes
- Second-order photonic topological insulator with corner states
- Novel Topological Phase with Zero Berry Curvature
- Topological Hybrid Silicon Microlasers
- Topological modes bound to dislocations in mechanical metamaterials
- Photonic crystal nanocavity based on a topological corner state
- Low-threshold topological nanolasers based on second-order corner state
- Topological photonic crystal nanocavity laser
- Lasing from multipole topological corner states
- Dirac-vortex topological cavity
- Dimensional Crossover of Topological Edge States in Su-Schrieffer-Heeger Model
- Topologically protected valley-dependent quantum photonic circuits
- Quantum interference of topological states of light
- Topological light-trapping on a dislocation
- Trapped state at a dislocation in a weak magnetomechanical topological insulator
- Weak indices and dislocations in general topological band structures