Talbot effect with rough reflection gratings.
The Talbot effect is analyzed when steel tape gratings are used. These gratings are made on a steel substrate, and, because of the manufacture process, both levels of the grating are rough with different roughness parameters. A theoretical analysis based on Fresnel regime, which considers the statistical properties of roughness, is developed. Analytical formulas that show a decreasing exponential dependence on the intensity in terms of the distance between the grating and the observation plane are obtained, and an experimental verification is also performed.
Torcal-Milla
Francisco Jose
FJ
Applied Optics Complutense Group, Department of Optics, Universidad Compltense de Madrid, Faculad de Ciencias Físicas, Ciudad Universitaria s.n., Madrid, Spain. ftorcalmilla@fis.ucm.es
Sanchez-Brea
Luis Miguel
LM
Bernabeu
Eusebio
E