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Nonlinear Control of Electromagnetic Topological Edge States.
D A Dobrykh1, A V Yulin1, A P Slobozhanyuk1,2
1ITMO University, St. Petersburg 197101, Russia.
Physical Review Letters
|November 3, 2018
Summary
Nonlinear effects enable spectral tuning of topological edge states in photonic circuits. This research demonstrates experimental control over these states, paving the way for tunable topological photonics.
Area of Science:
- Photonics
- Topological Materials
- Nonlinear Optics
Background:
- Topological photonics offers robust optical circuitry.
- Nonlinear effects are key to tuning topological states.
Purpose of the Study:
- To experimentally demonstrate nonlinearity-induced spectral tuning of electromagnetic topological edge states.
- To investigate the behavior of edge states under varying nonlinear pumping conditions.
Main Methods:
- Utilizing arrays of coupled nonlinear resonators.
- Employing a pump-probe experimental regime.
- Analyzing spectral shifts in edge and bulk modes.
Main Results:
- Weak nonlinearity causes spectral shifts primarily in edge modes.
- Strong pumping leads to edge state transformation and hybridization with bulk modes.
- Predicted a transition from stationary to dynamic regimes via parametric driving.
Conclusions:
- Nonlinear effects provide a mechanism for spectral tuning of topological edge states.
- Experimental control over these states is achievable.
- Potential for dynamic control and novel topological phenomena in photonic systems.
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