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Interactions of discrete solitons with structural defects.
R Morandotti1, H S Eisenberg, D Mandelik
1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.
Optics Letters
|June 5, 2003
Summary
Discrete solitons interact differently with attractive and repulsive defects in waveguide arrays. These findings highlight the influence of defect properties on soliton behavior and the underlying physics.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
- Nonlinear Dynamics
Background:
- Waveguide arrays are crucial for controlling light propagation.
- Discrete solitons are localized nonlinear waves in such arrays.
- Defect states can significantly alter wave dynamics.
Purpose of the Study:
- To investigate the interaction between discrete solitons and engineered defect states.
- To understand how defect properties (attractive vs. repulsive) influence soliton behavior.
- To explore the underlying physical mechanisms governing these interactions.
Main Methods:
- Fabrication of waveguide arrays with tunable defect sites.
- Engineering attractive and repulsive defects by adjusting waveguide spacing.
- Studying linear and nonlinear light propagation through the fabricated samples.
- Analyzing the role of the Peierls-Nabarro potential.
Main Results:
- Demonstrated distinct linear and nonlinear propagation properties in the presence of defects.
- Showcased control over defect type (attractive/repulsive) by modifying waveguide array geometry.
- Observed unique soliton interaction dynamics influenced by the engineered defects.
Conclusions:
- Discrete solitons exhibit complex interactions with engineered defect states.
- The Peierls-Nabarro potential plays a significant role in soliton-defect interactions.
- This work provides insights into controlling nonlinear wave propagation in structured media.