Enhancement of backscattered intensity in a random medium

Area of Science:

• Wave propagation
• Statistical optics
• Electromagnetics

Background:

• Bidirectional wave propagation through random media leads to complex effects.
• Understanding these effects is crucial for applications involving scattering and coherence.

Purpose of the Study:

• To develop a method for correlating forward and backward propagating waves in random media.
• To analyze the intensity enhancement in backscattering phenomena.

Main Methods:

• A paired field measure preserving random information along the path was introduced.
• An approximate analytical solution for the high-frequency propagator was derived using multiscale expansion.
• The solution was tested on a canonical backscattering problem.

Main Results:

• The derived solution allows generation of all even statistical moments of the field.
• The study validates the solution for calculating coherence measures of retroreflected fields.
• Intensity enhancement in backscattering was shown to be dependent on incident wavefront geometry.

Conclusions:

• The paired field measure and analytical solution provide a robust framework for studying bidirectional wave propagation.
• The findings offer insights into the physics of wave coherence and intensity enhancement in random media.