Surfaces roughness effects on the transmission of Gaussian beams by anisotropic parallel plates

Details Surfaces roughness effects on the transmission of Gaussian beams by anisotropic parallel plates Surfaces roughness effects on the transmission of Gaussian beams by anisotropic parallel plates

2003-10-17

arxiv.org/abs/physics/0310084v1

J.Phys.D36:2697-2704,2003

Physics

Accelerator Physics

18 pages, Journal of Physics D: Applied Physics, volume 36, issue 21, pages 2697 - 2704

Scientific paper

10.1088/0022-3727/36/21/016

Influence of the plate surfaces roughness in precise ellipsometry experiments is studied. The realistic case of a Gaussian laser beam crossing a uniaxial platelet is considered. Expression for the transmittance is determined using the first order perturbation theory. In this frame, it is shown that interference takes place between the specular transmitted beam and the scattered field. This effect is due to the angular distribution of the Gaussian beam and is of first order in the roughness over wavelength ratio. As an application, a numerical simulation of the effects of quartz roughness surfaces at normal incidence is provided. The interference term is found to be strongly connected to the random nature of the surface roughness.

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