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Controlling soliton refraction in optical lattices
Jaroslaw E Prilepsky1, Stanislav A Derevyanko, Sergey A Gredeskul
1Nonlinearity and Complexity Research Group, Aston University, B4 7ET Birmingham, United Kingdom. y.prylepskiy1@aston.ac.uk
Physical Review Letters
|September 21, 2011
Summary
Controlling soliton beam refraction in optical lattices is possible by tuning waveguide shape and position. Disordered lattices enhance soliton refraction compared to periodic ones, offering new possibilities in nonlinear optics.
Area of Science:
- Nonlinear Optics
- Waveguide Optics
- Soliton Physics
Background:
- Optical lattices are crucial for guiding light beams.
- Soliton beams exhibit unique propagation properties.
- Controlling light beam refraction is essential for optical devices.
Purpose of the Study:
- To investigate the control of fundamental soliton beam refraction angles in a 1D optical lattice.
- To analyze the impact of waveguide geometry and lattice arrangement on soliton refraction.
- To develop a theoretical framework for calculating refraction angle changes.
Main Methods:
- Utilizing the 1D nonlinear Schrödinger equation framework.
- Developing a general analytical approach for shallow refractive index modulation.
- Analyzing the influence of structural and geometric form factors on wave density and soliton behavior.
Main Results:
- Soliton refraction angle is controllable via individual waveguide shape and waveguide spacing.
- Waveguide shape introduces a structural form factor affecting emitted wave density.
- Wave-soliton interference in disordered lattices leads to a geometric form factor, enhancing refraction.
Conclusions:
- The study demonstrates tunable soliton refraction in optical lattices.
- Waveguide design and lattice disorder are key parameters for controlling soliton steering.
- Findings offer insights for designing advanced nonlinear optical systems and devices.
