Tunable multichannel Fibonacci one-dimensional terahertz photonic crystal filter

V Sepahvandi; B Rezaei; A H Aly

doi:10.1038/s41598-023-32769-0

Tunable multichannel Fibonacci one-dimensional terahertz photonic crystal filter

Sci Rep. 2023 Apr 6;13(1):5631. doi: 10.1038/s41598-023-32769-0.

Authors

V Sepahvandi¹, B Rezaei², A H Aly³

Affiliations

¹ Faculty of Physics, University of Tabriz, Tabriz, Iran.
² Faculty of Physics, University of Tabriz, Tabriz, Iran. behrezaei90@gmail.com.
³ TH-PPM Group, Physics Department, Faculty of Sciences, Beni-Suef University, Beni Suef, 62521, Egypt.

Abstract

This paper proposes a multichannel terahertz optical filter based on a one-dimensional photonic crystal with a third-order Fibonacci structure, including a bulk Dirac semimetal. The tuning of the optical properties of the proposed structure has been theoretically studied as a function of the Dirac semimetals' Fermi energy. Furthermore, the effects of the Fibonacci structure's periodic number and light's incident angle on optical channels were investigated. The results reveal that changes in the Fermi energy and incident angle remarkably affect the frequency and transmission of the optical channels. Additionally, the number of optical channels increases by increasing the periodic number of the Fibonacci structure.