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Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

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Published on: July 29, 2013

Recurrent scattering and memory effect at the Anderson localization transition.

A Aubry¹, L A Cobus², S E Skipetrov³

¹Institut Langevin, ESPCI ParisTech, CNRS UMR 7587, Université Denis Diderot-Paris 7, 1 rue Jussieu, 75005 Paris, France.

Physical Review Letters

|March 4, 2014

Summary

This summary is machine-generated.

Ultrasonic waves in strongly scattering mesoglass show a large memory effect due to recurrent paths. This memory effect is crucial for understanding wave propagation and Anderson localization transitions.

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Area of Science:

Condensed matter physics
Wave propagation in disordered media

Background:

Strongly scattering media like mesoglass exhibit complex wave phenomena.
Understanding wave localization is crucial for various physical systems.

Purpose of the Study:

To investigate ultrasonic wave propagation in strongly scattering mesoglass.
To analyze the spatial coherence and memory effects in backscattered fields.
To explore the relationship between recurrent scattering and Anderson localization.

Main Methods:

Ultrasonic measurements of the propagation operator.
Analysis of the backscattered field.
Investigation of recurrent scattering contributions.
Singular value decomposition of the propagation operator.

Main Results:

A deterministic spatial coherence was observed in the backscattered field.
A remarkably large memory effect induced by long recurrent trajectories was identified.
The probability of wave return to the starting point showed a dramatic decay change near the Anderson localization transition.
Intense recurrent scattering paths were found to dominate near the mobility edge.

Conclusions:

Recurrent scattering paths significantly influence wave propagation in mesoglass.
The memory effect is a key indicator for Anderson localization.
Ultrasonic measurements provide insights into wave behavior near localization transitions.