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Related Experiment Video

Updated: Jul 12, 2026

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Light scattering from particles located under a rough dielectric layer.

Valentin Freilikher¹, Yuri S Kaganovskii, Alexey Kotlyar

¹The Jack and Pearl Resnick Institute of Advanced Technology, Department of Physics, Bar-Ilan University, Ramat-Gan, Israel.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|August 31, 2007

Summary

This summary is machine-generated.

Roughness significantly impacts detecting subsurface particles using light scattering. At resonance, particles become detectable through increased intensity and distinct maxima, revealing their presence despite surface roughness.

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Area of Science:

Optics and Photonics
Materials Science
Surface Science

Background:

Detecting subsurface particles is crucial for material characterization and quality control.
Light scattering is a common non-destructive technique for probing materials.
Surface roughness can interfere with the accurate detection of subsurface features.

Purpose of the Study:

To investigate the effect of surface roughness on the detectability of subsurface particles using light scattering.
To understand the interplay between surface scattering and subsurface particle scattering.
To determine the conditions under which subsurface particles can be reliably identified.

Main Methods:

Experimental study of light scattering from calibrated spheres beneath a rough dielectric surface.
Theoretical modeling of light scattering phenomena, considering surface and particle interactions.
Analysis of scattering diagrams and backscattered intensity under varying conditions.

Main Results:

Surface roughness dominated scattering for non-resonant subsurface particles, obscuring their presence.
At resonance, subsurface particles significantly increased scattered intensity and produced distinct angular maxima.
Theoretical analysis confirmed that interference between surface and particle scattering determined scattering diagram maxima.
Multiple interparticle scattering was found to be negligible for the observed phenomena.

Conclusions:

Subsurface particle detection via light scattering is feasible, particularly at resonance, even with surface roughness.
The interference of scattered fields is key to observing subsurface particles through scattering diagram modifications.
Surface roughness effects must be accounted for, but resonance conditions enable reliable detection.