Mie scattering by soft core-shell particles and its applications to ellipsometric light scattering

Area of Science:

• Physics
• Optical Sciences
• Materials Science

Background:

• Core-shell particles are crucial in various scientific applications.
• Understanding light scattering from these particles is essential for characterization.
• Previous models often simplify the geometry, neglecting nonconcentricity.

Purpose of the Study:

• To develop a theoretical framework for analyzing light scattering from nonconcentric core-shell particles.
• To quantify the sensitivity of scattering properties to variations in shell thickness and particle geometry.
• To provide a basis for designing advanced light-scattering experiments.

Main Methods:

• Generalized Mie theory for multiple spheres was employed.
• Derivatives of scattering matrix elements and ellipsometric variables were calculated.
• Analysis focused on variations with shell thickness and distance between particle centers.

Main Results:

• The study provides analytical expressions for the derivatives of scattering parameters.
• Sensitivity of ellipsometric light scattering to nonconcentricity and shell thickness was quantified.
• Computed results offer model contrast for various particle sizes and fluctuation modes.

Conclusions:

• The derived theoretical framework enables precise quantitative modeling of core-shell systems.
• The findings are instrumental in guiding the design of novel light-scattering experiments.
• This work advances the understanding and characterization of complex particle systems.