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Light controlling in transverse separation modulated photonic lattices
Zheng Cao1, Xinyuan Qi, Xuanqi Feng
1Department of Physics, Northwest University, Xi’an 710069, China.
Optics Express
|October 6, 2012
Summary
Researchers numerically studied Gaussian beam propagation in modulated photonic lattices. Certain modulations create optical potentials, localizing or recurring light waves, while others cause decay, offering new light control methods.
Area of Science:
- Optics and Photonics
- Wave Propagation
- Materials Science
Background:
- Photonic lattices are engineered materials with periodic structures that influence light propagation.
- Controlling light behavior within these lattices is crucial for optical device development.
- Transverse separation modulation offers a novel approach to tailoring lattice properties.
Purpose of the Study:
- To numerically investigate the propagation dynamics of Gaussian beams in four distinct types of transverse separation modulated photonic lattices.
- To explore the influence of different modulation functions (hyperbolic secant, rectangular) on light localization and recurrence.
- To identify potential applications in light manipulation and control.
Main Methods:
- Numerical simulations were employed to model Gaussian beam propagation.
- Four types of transverse separation modulated photonic lattices were designed and analyzed.
- The effects of positive and negative optical potentials created by modulation functions were examined.
Main Results:
- Modulations based on hyperbolic secant and rectangular functions act as effective optical potentials.
- Light waves exhibited localization or recurrence between positive potentials.
- Beams decayed in regions between negative potentials, indicating a lack of localized modes.
- The study demonstrated distinct behaviors based on the nature of the potential.
Conclusions:
- Transverse separation modulated photonic lattices can be designed to control light propagation.
- Hyperbolic secant and rectangular modulations offer tunable optical potentials for light localization and recurrence.
- These findings present new avenues for advanced light manipulation and control in photonic devices.
