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Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
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Interplay between localization and absorption in disordered waveguides.

Alexey G Yamilov1, Ben Payne

  • 1Department of Physics, Missouri University of Science & Technology, Rolla, MO 65409, USA. yamilov@mst.edu

Optics Express
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Summary
This summary is machine-generated.

Wave interference in disordered waveguides causes absorption-dependent diffusion. The diffusion coefficient saturates, not reaching zero, which is described by self-consistent theory (SCT) for localized wave transport.

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Area of Science:

  • Condensed matter physics
  • Wave phenomena in disordered media
  • Photonics and optics

Background:

  • Wave transport in disordered systems is typically described by diffusion.
  • Absorption and wave interference effects can significantly alter transport behavior.
  • Understanding these deviations is crucial for applications in photonics and material science.

Purpose of the Study:

  • To investigate the impact of absorption on continuous wave transport in disordered waveguides.
  • To analyze deviations from the standard diffusive transport picture.
  • To explore the applicability of the self-consistent theory (SCT) in regimes with significant absorption.

Main Methods:

  • Ab-initio simulations of wave transport.
  • Analysis of wave interference effects on diffusion coefficient.
  • Application of self-consistent theory (SCT) for localization.

Main Results:

  • Wave interference leads to position- and absorption-dependent diffusion coefficients.
  • In infinite absorbing random media, the diffusion coefficient saturates at a finite value, never reaching zero.
  • The transition to absorption-limited diffusion demonstrates universality captured by SCT.

Conclusions:

  • The study justifies the use of SCT for analyzing experiments in the localized regime when absorption is non-negligible.
  • It suggests that a diffusive description of wave transport is possible even in the saturation regime, despite strong localization effects.