Haze and light diffraction of dielectric line-gratings

TL;DR

This paper investigates the optical diffraction and haze effects of dielectric line-gratings with large periods, using experimental, numerical, and analytical methods to understand their scattering behavior.

Contribution

It provides a comprehensive analysis combining experiments, simulations, and analytical models to characterize diffraction and haze in dielectric line-gratings with large periods.

Findings

Diffraction efficiencies are accurately predicted by a closed-form approximate solution.

The angular width of scattering increases with grating profile amplitude.

Haze levels are quantified and related to grating parameters.

Abstract

The optical characterization of dielectric periodic line-gratings for which the period of the grating is significantly larger than the probing wavelength is investigated experimentally, numerically, and analytically. The experimental diffraction efficiencies are analyzed in transmission with the help of a closed-form approximate solution within a single scattering picture. In particular, the angular width of significant scattering and the haze are analyzed for samples of increasing grating profile amplitude.