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Scattering And Absorption of Light in Planetary Regoliths

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Electromagnetic scattering from a multilayered sphere located in an arbitrary beam.

F Onofri, G Gréhan, G Gouesbet

|November 10, 2010

Summary

This study presents a method to calculate how arbitrary beams scatter off multilayered spheres. The findings simplify scattering analysis for complex beam shapes, aiding in optical simulations.

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Area of Science:

Electromagnetics and Optics
Computational Physics

Background:

Scattering of electromagnetic waves by spherical particles is fundamental in optics.
Analyzing scattering for arbitrary beams, like Gaussian beams, is complex.
Existing models often focus on plane-wave illumination.

Purpose of the Study:

To develop a generalized solution for scattering of arbitrary shaped beams by multilayered spheres.
To provide expressions for internal and external electromagnetic fields.
To demonstrate a method for generating scattering coefficients from plane-wave solutions.

Main Methods:

Utilized Bromwich potentials and boundary conditions.
Derived expressions for external and internal fields.
Developed a method to generate arbitrary beam scattering coefficients from plane-wave solutions.

Main Results:

Provided a comprehensive solution for arbitrary beam scattering from multilayered spheres.
Showcased that scattering coefficients for arbitrary beams can be derived from plane-wave cases.
Presented numerical results for scattering patterns and radiation pressure.

Conclusions:

The developed method offers a simplified approach to analyzing scattering for complex beams.
This work facilitates more accurate optical simulations involving multilayered spherical particles.
Numerical results validate the theoretical framework for Gaussian beams and plane waves.