Eur. Phys. J. B (2021) 94: 198
https://doi.org/10.1140/epjb/s10051-021-00194-9

Regular Article - Solid State and Materials

Characterization of spectral features of cavity modes in one-dimensional graphene-based photonic crystal structures

¹ Department of Physics, College of Applied Sciences, Umm Al-Qura University, Mecca, Saudi Arabia
² Department of Industrial Engineering, College of Engineering, University of Ha’il, 2440, Ha’il, Saudi Arabia
³ Nanomaterials Technology unit, Basic and Applied Scientific Research Center (BASRC), College of Science of Dammam, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, 31441, Dammam, Saudi Arabia
⁴ Department of Electrical Engineering, College of Engineering, University of Ha’il, 2440, Ha’il, Saudi Arabia

^a wbbelhadj@uqu.edu.sa

Received: 5 May 2021
Accepted: 31 August 2021
Published online: 4 October 2021

Abstract

In this study, a numerical approach based on the transfer-matrix method (TMM) is employed to investigate, the optical features of an ultra-high-quality factor (Q-factor). The cavity is formed by incorporating a defect layer in a one-dimensional graphene photonic crystal (1D-GPC) structure. The cavity modes are identified, and the dependency of their spectral characteristics on the opto-geometrical parameters of the structure and the chemical potential (${\mu }_{\mathrm{C}})$ of graphene are investigated in detail. Our simulation results indicate that a tunable ultra-high Q-factor is attainable with the proposed cavity device. It is shown that the eigenfrequencies of the cavity modes vary in similar way versus the considered parameters. While, their Q-factors exhibit some differences in their changes with the thicknesses of the material layers. We have also noticed that the proposed cavity exhibits a cavity mode whose Q-factor increases exponentially with the number of layers in the distributed Bragg reflectors and with the graphene chemical potential. The observed tunable features of such kind of high Q-factor cavity make it an ideal candidate for the realization of ultrasmall tunable narrowband filters, sensing devices, and low-threshold lasers.