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Perfect Transmission through Disordered Media.

C G King¹, S A R Horsley¹, T G Philbin¹

¹Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom.

Physical Review Letters

|May 6, 2017

Summary

This summary is machine-generated.

We demonstrate novel disordered materials that allow perfect wave transmission, defying typical exponential decay seen in random media. These materials offer unprecedented control over wave propagation, challenging concepts like Anderson localization.

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Area of Science:

Wave physics
Materials science
Electromagnetism

Background:

Wave transmission through disordered media typically exhibits exponential decay.
Anderson localization describes wave confinement in random potentials.
Controlling wave propagation in complex materials remains a significant challenge.

Purpose of the Study:

To investigate the possibility of achieving perfect wave transmission through disordered media.
To construct novel disordered permittivity profiles with unique wave-optic properties.
To challenge the conventional understanding of wave behavior in random environments.

Main Methods:

Construction of complex-valued disordered planar permittivity profiles.
Analysis of wave transmission for all angles of incidence.
Development of real-valued disordered permittivity profiles for specific conditions.

Main Results:

Demonstrated one-way reflectionless wave transmission with a unity coefficient for complex-valued disordered profiles.
Achieved two-way reflectionless and perfectly transmitting disordered profiles for specific incidence angles and frequencies.
Identified novel disordered material designs that overcome exponential decay in wave transmission.

Conclusions:

Disordered media can be engineered for perfect wave transmission, contrary to typical Anderson localization effects.
Complex-valued and real-valued disordered permittivity profiles offer distinct pathways to control wave propagation.
These findings open new avenues for metamaterial design and wave manipulation.