Coupled dipole method for modeling optical properties of large-scale random media

Area of Science:

• Materials Science
• Optics
• Computational Physics

Background:

• Modeling optical properties of materials is crucial for understanding light-matter interactions.
• Existing methods may struggle with large-scale, inhomogeneous materials and complex morphologies.

Purpose of the Study:

• To extend the coupled dipole approximation for modeling optical properties of large-scale homogeneous and inhomogeneous slabs.
• To incorporate interactions between dipoles at arbitrary distances within a slab.

Main Methods:

• Modification of the Green's function within the coupled dipole approximation.
• Accounting for dipole-dipole interactions in large slab geometries.
• Modeling component size, spatial distribution, and surface roughness in composite materials.

Main Results:

• The extended method adequately describes far-field optical properties.
• Accurate prediction of specular and diffuse reflection of light.
• Capability to model complex structural morphologies of composite materials.

Conclusions:

• The enhanced coupled dipole approximation is effective for modeling optical properties of large material slabs.
• This method provides a robust tool for analyzing light reflection from materials with diverse structures.
• The technique is suitable for both homogeneous and inhomogeneous materials, including surface effects.