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Light propagation in binary kagome ribbons with evolving disorder.

A Radosavljević¹, G Gligorić¹, P P Beličev¹

¹P* Group, Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.

Physical Review. E

|January 20, 2018

Summary

This summary is machine-generated.

Disorder in binary kagome ribbons enables flat band states to spread diffusively, showing diffractionless propagation. The flat band dominates diffusion, with other spectral states causing minor changes in light spreading.

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Area of Science:

Condensed Matter Physics
Photonics
Wave Phenomena

Background:

Kagome lattices are known for unique electronic and photonic properties.
Flat bands in periodic structures can lead to exotic phenomena like Anderson localization.
Understanding light propagation in disordered systems is crucial for device applications.

Purpose of the Study:

To investigate the role of evolving disorder in binary kagome ribbons.
To study the diffusive spreading of flat band states and their diffractionless propagation.
To analyze the influence of flat bands on light diffusion in disordered photonic systems.

Main Methods:

Numerical analysis of light propagation in binary kagome ribbons with controlled disorder.
Tailoring the binarism of kagome ribbons to isolate flat bands.
Systematic study of the flat band's influence on diffusion by controlling disorder strength and rate of change.

Main Results:

Flat band states exhibit diffusive spreading characterized by diffractionless propagation.
The flat band plays a dominant role in establishing diffusion under specific disorder conditions.
Other spectral bands induce only quantitative variations in light spreading regimes.

Conclusions:

Evolving disorder in binary kagome ribbons facilitates diffusive spreading of flat band states.
The flat band is the primary driver of diffusion, irrespective of other spectral components.
Findings are relevant to disordered physical systems with flat spectral bands, including photonics, ultracold matter, and plasmonics.