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All Journal International Journal of Electronics and Communications Systems
Khalid, Shalaw Saman
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Computer Science & IT Electrical & Electronics Engineering

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Near Infrared -Visible Photonic Bandgap in One-Dimensional Periodic Photonic Crystal Structure Composed of Tio2/Te Layers Khalid, Shalaw Saman; Abdulkareem, Sarkew Salah; Ahmed, Sana Latif; Talib, Sana Dishad; Ghidan, Shahla Ahmed
International Journal of Electronics and Communications Systems Vol. 3 No. 1 (2023): International Journal of Electronics and Communications System
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ijecs.v3i1.17120

Abstract

In this present paper, we consider some features of the states of one-dimensional photonic crystals. Form the numerical results performed by transfer matrix method in periodic multilayer structure made of titanium dioxide and tellurium material, it is found that the structure possesses a photonic band gap it was determined that the structure has a photonic band gap in the borderline visible and infrared spectral region. Our predictions were in good agreement with the photonic bandgap tuning. Our simple model can also predict and explain the effect of incidence angle and wavelength and number of layers on the photonic bandgap. We expect such structures to play an important role in micromechanical tunable optical sensors and filters.
Polarization and Phase Control of Electromagnetic Waves in Periodic and Quasiperiodic Photonic Crystals using Fullerene and Tellurium Nanolayers Khalid, Shalaw Saman; Ahmed, Sana Latif; Abdula, Saman Othman; Abdurahman, Shene Aziz
International Journal of Electronics and Communications Systems Vol. 4 No. 2 (2024): International Journal of Electronics and Communications System
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ijecs.v4i2.23618

Abstract

This study presents the phase control and polarization of electromagnetic waves emitted in quasiperiodic crystals such as Fibonacci, T-M, DP, and RS and the periodic structure of a photonic crystal consisting of fullerene and tellurium nanoscales in near-infrared -visible wavelengths. By examining the arrangement of layers in quasi-periodic crystals, which, like periodic structures, possess band gaps that impede the transmission of electromagnetic waves, we can determine the specific region where the photonic band gap (PBG) is formed for both transverse electric (TE) and transverse magnetic (TM) polarization waves. Subsequently, after examining the transmitted light that passed through our structure, we have identified the band gap of different structures. Also, we have plotted the phase changes in the center and edges of the band gap. After taking into account the magnitude of the electric field and the phase difference, it becomes evident that when elliptically polarized light is transmitted, a tilt angle is seen corresponding to the angle of polarization. The paper used the renowned transfer matrix approach. According to our research, the suggested design enables the creation of very condensed phase controllers, such as phase retarders and polarizers.
Co-Authors Abdula, Saman Othman Abdulkareem, Sarkew Salah Abdurahman, Shene Aziz Ahmed, Sana Latif Ghidan, Shahla Ahmed Talib, Sana Dishad