PHYSICS

Reflection of the TE polarized light from a metallic film at the anomalous skin effect

A. B. Sotsky, S. O. Parashkov, A. N. Vasilenko

A. A. Kuleshov Mogilev State University, Mogilev, Belarus

Abstract: The theory of optical skin effect at the excitation of a metallic film by an obliquely incident TE polarized plane wave is developed. Analytical expressions for the electric field in the film and for the film reflectance that contain separated contributions of the normal and anomalous skin effects are obtained with the use of the perturbation method. Angular reflectance spectra for Ag, Au and Ti films are investigated numerically. It is shown, that the accuracy of the normal skin effect approximation is reduced with decreasing of the film thickness. The use of this approximation in solving of the inverse problem of optical reflectometry of Ag and Au films of few nanometers in thickness led to significant errors for the reconstructed parameters of the films.

Keywords: anomalous skin effect, metallic film, reflectance of light, inverse optical problem.

UDC: 535.015; 535.016

Received: 11.09.2014