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Diffuse reflectance and transmittance spectra of an interference layer: 1. Model formulation and properties
1994 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 33, no 34, 7908-7917 p.Article in journal (Refereed) Published
Abstract [en]

A model for the calculation of the diffuse reflectance and transmittance of a single interference layer with rough interfaces on a transparent substrate is presented. The model is based on electric field calculations and scalar scattering theory, and it assumes that the interfaces of the layer are totally uncorrelated. Examples are given of calculated spectra in which the parameters of the model are varied systematically to show the influence from different interface roughness and refractive index combinations as well as absorption in the film. A wavelength-dependent effective root-mean-square roughness is introduced. This depends on the nature of the roughness, and the bandwidth limits are given by the experimental conditions. Finally, total integrated scattering spectra are calculated and the importance of taking multiple reflections in the substrate into account is shown.

Place, publisher, year, edition, pages
1994. Vol. 33, no 34, 7908-7917 p.
Keyword [en]
Bandwidth; Calculations; Electric fields; Interfaces (materials); Light absorption; Light transmission; Mathematical models; Optical coatings; Reflection; Refractive index; Spectrum analysis; Surface roughness, Diffuse reflectance; Diffuse transmittance; Interference layer; Root mean square roughness; Scattering theory; Total integrated scattering, Light scattering
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:hig:diva-23236DOI: 10.1364/AO.33.007908ISI: A1994PZ82300011ScopusID: 2-s2.0-0028756542OAI: oai:DiVA.org:hig-23236DiVA: diva2:1062977
Available from: 2017-01-09 Created: 2017-01-05 Last updated: 2017-01-09Bibliographically approved

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Rönnow, Daniel
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