Light propagation through thin films: the amplitude and phase representation

Ruth Diamant

doi:10.1117/12.902219

2 November 2011 Light propagation through thin films: the amplitude and phase representation

Ruth Diamant

Proceedings Volume 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World; 801163 (2011) https://doi.org/10.1117/12.902219
Event: International Commission for Optics (ICO 22), 2011, Puebla, Mexico

Abstract

The amplitude and phase representation of classic electromagnetic waves is used to model light propagating through a stratified medium, with a continuous refractive index profile. This medium is assumed to be isotropic, non magnetic, electrically neutral, transparent, dielectric, with a linear response, but letting the electric permittivity vary along the z direction. No approximations regarding a slowly or strongly varying refractive index, compared to the wavelength, are made. This is particularly convenient when the refractive index varies on a wavelength scale. The case of a thin film at normal incidence is studied for various thicknesses and interface ranges. The corresponding nonlinear amplitude differential equation is numerically solved. The amplitude oscillations are construed in terms of counter-propagating waves and the film's reflectivity is evaluated.

Citation Download Citation

Ruth Diamant "Light propagation through thin films: the amplitude and phase representation", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801163 (2 November 2011); https://doi.org/10.1117/12.902219

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