Optically controllable coupling between edge and topological interface modes of graphene metasurfaces
arXiv:2208.06545 · doi:10.1088/2040-8986/ac8940
Abstract
Nonlinear topological photonics has been attracting increasing research interest, as it provides an exciting photonic platform that combines the advantages of active all-optical control offered by nonlinear optics with the unique features of topological photonic systems, such as topologically-protected defect-immune light propagation. In this paper, we demonstrate that topological interface modes and trivial edge modes of a specially designed graphene metasurface can be coupled in a tunable and optically controllable manner, thus providing an efficient approach to transfer optical power to topologically protected states. This is achieved in a pump-signal configuration, in which an optical pump propagating in a bulk mode of the metasurface is employed to tune the band structure of the photonic system and, consequently, the coupling coefficient and wave-vector mismatch between edge and topological interface modes. This tunable coupling mechanism is particularly efficient due to the large Kerr coefficient of graphene. Importantly, we demonstrate that the required pump power can be significantly reduced if the optical device is operated in the slow-light regime. We perform our analysis using both \textit{ab initio} full-wave simulations and a coupled-mode theory that captures the main physics of this active coupler and observe a good agreement between the two approaches. This work may lead to the design of active topological photonic devices with new or improved functionality.
12 pages, 8 figures
References in corpus (33)
- Topological Insulators
- Topological insulators and superconductors
- Topological Photonics
- Topological Photonics
- Graphene plasmonics
- Possible Realization of Directional Optical Waveguides in Photonic Crystals with Broken Time-Reversal Symmetry
- Valley contrasting physics in graphene: magnetic moment and topological transport
- Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
- Imaging topological edge states in silicon photonics
- Scheme to Achieve Silicon Topological Photonics
- Reflection-Free One-Way Edge Modes in a Gyromagnetic Photonic Crystal
- Controlling electron-phonon interactions in graphene at ultra high carrier densities
- Quantum spin Hall effect of light
- All-Si Valley-Hall Photonic Topological Insulator
- A Silicon-on-Insulator Slab for Topological Valley Transport
- Edge Solitons in Nonlinear Photonic Topological Insulators
- Observation of Topological Band Gap Solitons
- A topological source of quantum light
- Magnetic field tuning of terahertz Dirac plasmons in graphene
- Topologically Robust Transport of Photons in a Synthetic Gauge Field
- Third-harmonic generation in photonic topological metasurfaces
- Infrared Topological Plasmons in Graphene
- Giant optical nonlinearity of graphene in a strong magnetic field
- Topological quantum fluctuations and travelling wave amplifiers
- Four-wave Mixing of Topological Edge Plasmons in Graphene Metasurfaces
- Nonlinear one-way edge-mode interactions for frequency mixing in topological photonic crystals
- Second-harmonic generation via double topological valley-Hall kink modes in all-dielectric photonic crystals
- Experimental Characterization of Ultrafast, Tunable and Broadband Optical Kerr Nonlinearity in Graphene
- Valley-Hall topological plasmons in a graphene nanohole plasmonic crystal waveguide
- Topological valley plasmon transport in bilayer graphene metasurfaces for sensing applications
- Tunable and Dual-broadband Giant Enhancement of SHG and THG in a Highly-engineered Graphene-Insulator-Graphene Metasurface
- Theory of Pulsed Four-Wave-Mixing in One-dimensional Silicon Photonic Crystal Slab Waveguides
- Topological Aspect of Graphene Patchwork with Regular Arrays of Nano Holes