Theoretical investigation of optical properties of Aluminum zig-zag thin films

Maryam Gholizadeh Arashti ¹ (Department of Physics, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran)
Mahsa Fakharpour ² (Department of Physics, Maybod Branch, Islamic Azad University, Maybod, Iran.)

Submited date : 2020-08-19 accepted date : 2020-10-29

Keywords: Reflectance, Transfer matrix, Zig-zag nanostructure, Linearly polarized light, Bragg phenomenon,

Abstract :

The transmission matrix method was applied to model the reflection and transmission co-polarization spectra of zig-zag aluminum thin films by different arm numbers and lengths and the optical spectra of the zig-zag nanostructures for both s- and p- polarized lights were obtained at different incident angles. According to the results, for the s- polarized incident light, the transmission reduces and the reflection increases by incident angle. For the p- polarized light, the reflection reduces else for the incident directions near the Bruster’s angle and the transmission almost remains constant. The numbers of Bragg peaks via arm number were also considered for s-polarized light at the 〖60〗^° incident angle. The results determined four arms as the period of zig-zag structure. Besides, the red and blue shifts were observed for the wavelengths smaller and greater than 550 nm, respectively. At last, no Bragg peak was observed for p-polarized light at all incident angles.