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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Localization of light in a parabolically bending waveguide array in thermal nonlinear media.
Fangwei Ye1, Liangwei Dong, Bambi Hu
1Department of Physics, Centre for Nonlinear Studies and The Beijing-Hong Kong-Singapore Joint Centre for Nonlinear and Complex Systems (Hong Kong), Hong Kong Baptist University, Kowloon Tong, China. fwye@hkbu.edu.hk
Optics Letters
|March 3, 2009
Summary
Localized stationary solitons were discovered in curved optical waveguides. Nonlinearity suppresses curvature effects, enabling stable propagation along bent paths without loss.
Area of Science:
- Nonlinear optics
- Waveguide optics
- Soliton physics
Background:
- Optical solitons are self-reinforcing light pulses that maintain their shape.
- Nonlinear optical media alter light propagation based on intensity.
- Waveguide arrays confine and guide light through specific channels.
Purpose of the Study:
- To investigate the existence and stability of localized stationary solitons in curved waveguide arrays.
- To analyze the role of nonlinearity and nonlocality in soliton localization within curved structures.
- To provide an analytical criterion for soliton localization in this specific geometry.
Main Methods:
- Theoretical modeling of a waveguide array imprinted into a thermal nonlinear medium.
- Analytical derivation of the localization criterion for solitons.
- Numerical simulations to confirm stable soliton propagation along curved trajectories.
Main Results:
- Demonstrated the existence of localized stationary solitons in a parabolically bending waveguide array.
- Showed that nonlinearity suppresses the curvature effect, leading to localization.
- Derived an analytical criterion for this localization phenomenon.
- Confirmed stable, lossless propagation of solitons along curved paths.
- Observed significant influence of waveguide curvature on soliton location.
Conclusions:
- These findings present the first instance of stationary localized solitons in curved waveguides.
- The study highlights the interplay between waveguide geometry, nonlinearity, and soliton dynamics.
- The results offer potential for novel optical devices utilizing controlled soliton propagation in curved structures.
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