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Dynamics of topological light states in spiraling structures
Yaroslav V Kartashov1, Victor A Vysloukh, Lluis Torner
1ICFO-Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, 08860 Castelldefels (Barcelona), Spain. Yaroslav.Kartashov@icfo.es
Optics Letters
|August 31, 2013
Summary
Researchers reveal a method to control light beam topology using spiraling structures. This technique allows for the dynamic generation and manipulation of optical vortices, offering precise control over light
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
Background:
- Controlling the topological properties of light states is crucial for advanced optical applications.
- Spiraling structures offer unique possibilities for light manipulation due to their geometric properties.
Purpose of the Study:
- To expose a mechanism for the dynamical generation and control of light states with diverse topologies.
- To investigate the role of spiraling refractive index landscapes in controlling topological charges.
- To explore the impact of nonlinearity on resonant vortex generation.
Main Methods:
- Utilizing spiraling shallow refractive index landscapes to induce coupling and energy exchange between light states.
- Analyzing resonant effects for optical vortex excitation from vortex-free inputs.
- Investigating nonlinear effects on resonant curves and frequencies.
- Examining vortex dynamic generation in both total internal reflection waveguides and Bragg-guiding hollow-core geometries.
Main Results:
- Demonstrated resonant coupling and periodic energy exchange between states with different topological charges.
- Showcased the excitation of optical vortices from vortex-free inputs.
- Established control over the output topological charge of light beams.
- Observed strong asymmetrization and frequency shifts in resonant curves due to nonlinearity.
- Confirmed resonant vortex dynamic generation, including revivals, in various guiding structures.
Conclusions:
- Spiraling structures provide an effective mechanism for dynamical generation and control of light states with engineered topologies.
- Resonant effects in these structures enable precise control over optical vortex properties.
- Nonlinearity plays a significant role in modifying the resonant behavior, offering further control avenues.
- The demonstrated principles are applicable to diverse optical guiding systems, including waveguides and hollow-core geometries.
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