Talbot effect with rough reflection gratings |
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Authors: | Torcal-Milla Francisco Jose Sanchez-Brea Luis Miguel Bernabeu Eusebio |
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Affiliation: | 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 |
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Abstract: | 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. |
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