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Multifrequency Solitons in Commensurate-Incommensurate Photonic Moiré Lattices.
Yaroslav V Kartashov1,2, Fangwei Ye3, Vladimir V Konotop4
1ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.
Physical Review Letters
|November 1, 2021
Summary
Photonic moiré patterns enable parametric soliton formation in nonlinear media. Their geometry significantly reduces excitation power and broadens phase-matching bandwidths for enhanced soliton generation.
Area of Science:
- Nonlinear optics
- Photonics
- Condensed matter physics
Background:
- Parametric solitons are crucial for optical signal processing.
- Photonic moiré patterns offer novel ways to control light propagation.
- Understanding geometry's impact on soliton formation is key.
Purpose of the Study:
- Investigate how moiré pattern geometry influences parametric soliton formation.
- Analyze the joint trapping of multiple waves into solitons.
- Determine the effect of geometry on phase matching conditions and bandwidth.
Main Methods:
- Theoretical prediction of soliton formation in moiré patterns.
- Analysis of wave coupling and trapping mechanisms.
- Numerical simulations to validate predictions.
Main Results:
- Moiré patterns drastically reduce threshold power for soliton excitation above the localization-delocalization transition.
- Geometry shifts phase matching conditions to eigenmode band edges, altering soliton properties.
- Significantly broadened phase-mismatch bandwidth for soliton generation observed.
Conclusions:
- Photonic moiré patterns provide a powerful platform for generating and controlling parametric solitons.
- Geometric engineering of moiré patterns offers unprecedented tunability of soliton characteristics.
- This work opens new avenues for advanced optical devices and applications.
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