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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Transmitted scattered light from a thin film with shallow random rough interfaces
Applied Optics
|December 4, 2010
Summary
Scattering of light from rough metallic films was calculated. Transmitted intensity peaked at surface-plasma wave excitation angles for p-polarized light.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
- Electromagnetism
Background:
- Understanding light scattering from thin metallic films is crucial for applications in plasmonics and optical devices.
- Surface roughness significantly influences the optical properties and scattering behavior of metallic thin films.
Purpose of the Study:
- To calculate the transmitted scattered energy of plane electromagnetic waves from thin metallic films with shallow rough interfaces.
- To investigate the effect of surface roughness and polarization on light scattering.
- To analyze scattering phenomena in the context of attenuated total reflection (ATR) and surface-plasma wave (SPW) excitation.
Main Methods:
- Modeling interfaces as independent stationary random processes with a Gaussian roughness spectrum.
- Utilizing the Rayleigh method to derive an integral equation for the transmitted field.
- Solving the integral equation using Fourier coefficients dependent on roughness profiles.
Main Results:
- Calculations were performed for both transverse magnetic (TM or p) and transverse electric (TE or s) polarizations.
- Scattering was analyzed for normal and oblique angles of incidence.
- A maximum in transmitted scattered intensity was observed at the surface-plasma wave excitation angle (θ(sp)) for p-polarized light in ATR configuration.
Conclusions:
- The study provides a theoretical framework for calculating light scattering from rough metallic films.
- Surface roughness and polarization play significant roles in determining scattered light intensity.
- The findings highlight the resonant behavior of light scattering at SPW excitation angles, particularly for p-polarization.
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