TE Polarization Light Propagation in Anisotropic Thin Film for Optical telecommunication

¹ Laboratory of Materials, Waves, Energy and Environnement, Team of Waves, Acoustics, Photonics and Materials, Mohamed I University, Oujda, Morocco, Email : This email address is being protected from spambots. You need JavaScript enabled to view it. , This email address is being protected from spambots. You need JavaScript enabled to view it. , This email address is being protected from spambots. You need JavaScript enabled to view it. , This email address is being protected from spambots. You need JavaScript enabled to view it.
² Engineering Sciences Laboratory (LSI), Multidisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University, B.P. 1223, Taza Gare, Fes, Morocco, Email : This email address is being protected from spambots. You need JavaScript enabled to view it. , This email address is being protected from spambots. You need JavaScript enabled to view it.
³ Catalan Institute of Nanoscience and Nanotechnology CSIC and BIST Campus UAB, Bellaterra 08193, Barcelona, Spain, Email : This email address is being protected from spambots. You need JavaScript enabled to view it.
⁴ Department of Math. & Sc., Dhofar University, Salalah, Oman, Email : This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 24 June 2026

Abstract

Understanding how light behaves in anisotropic materials is important for improving photonic devices, especially those used in optical communication. In this work, we look at the propagation of TE-polarized light through a uniaxial anisotropic thin film. The study is based on the Transfer Matrix Method and considers different film thicknesses (50–80 nm) as well as incidence angles between 50° and 80°, within the UV-visible range.

From the results, it can be seen that increasing the thickness causes the maximum transmission to move gradually toward longer wavelengths. This effect is mainly linked to the increase of the optical path inside the layer, which changes the interference conditions. At the same time, a slight increase in reflection is noticed. When the incidence angle changes, the behavior is different, with a small shift toward shorter wavelengths and some variation in transmission.

The analysis of phase, phase time, and group velocity also shows that dispersion plays an important role, and that it is affected by both film thickness and angle of incidence. These observations indicate that anisotropic thin films can be used to adjust light propagation, which can be useful for applications such as filtering, modulation, and dispersion control in optical communication systems.