2003/10/15 by F. Zomer, Fabian Zomer · 2 citations
Arts and Humanities · Engineering · Physics and Astronomy · #Anisotropy #Beam (structure) #Cultural Heritage Materials Analysis #Gaussian #Gaussian beam #Interference (communication) #Laser-induced spectroscopy and plasma #Materials science #Optics #Physics #Specular reflection #Surface Roughness and Optical Measurements #Surface finish #Surface roughness #Transmittance #Wavelength #physics.acc-ph
paper · pdf · doi:10.1088/0022-3727/36/21/016
published in Journal of Physics D Applied Physics 36(21), 2697-2704 (Institute of Physics) · 18 pages, Journal of Physics D: Applied Physics, volume 36, issue 21, pages 2697 - 2704
openalex publication_date 2003/10/15 · arxiv created 2003/10/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The influence of plate surface roughness in precise ellipsometry experiments is studied. The realistic case of a Gaussian laser beam crossing a uniaxial platelet is considered. The expression for the transmittance is determined using 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 to wavelength ratio. As an application, a numerical simulation of the effects of the roughness of a quartz surface at normal incidence is provided. The interference term is found to be strongly connected to the random nature of the surface roughness.