Zobrazeno 1 - 10 of 24 pro vyhledávání: '"Ahmad S Azzahrani"'
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Akademický článek
Investigation and estimation of structural and dielectric properties of chromium-doped cobalt ferrites nano particles
Autor: Huda Jabbar Abdulhussein, Enas Muhi Hadi, Evan T Salim, Ahmad S Azzahrani, Subash C B Gopinath
Publikováno v: Materials Research Express, Vol 11, Iss 11, p 115002 (2024)
Nano ferrite materials are of critical importance in meeting the global demand for microwave and electronic devices, as spinel ferrites possess remarkable morphological, structural, and dielectric characteristics. This study investigates chromium-dop
Externí odkaz: https://doaj.org/article/bc55f134836d4c5f886cd4bcb4eab925
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2
Structural and Textural Defects of Nanophotonic Lithium Niobate Optical Waveguide
Autor: Ahmad S. Azzahrani, Ahmed C. Kadhim, Makram A. Fakhri, Evan T. Salim, Forat H. Alsultany
Publikováno v: Frontiers in Optics + Laser Science 2022 (FIO, LS).
In this article, structural and textural defects of LiNbO 3 waveguide are investigated using SEM imaging technology. The outcomes show that maximum power transfer can be maintained with a crack-free edges of the optical waveguide.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e26520e5fc6968df31261641b7340404
https://doi.org/10.1364/fio.2022.jw4a.3
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3
Low Loss Power Nano-Photonic LiNbO3 Optical Waveguide
Autor: Ahmed C. Kadhim, Ahmad S. Azzahrani, Evan T. Salim, Makram A. Fakhri, Forat H. Alsultany
Publikováno v: Frontiers in Optics + Laser Science 2022 (FIO, LS).
LiNbO3 optical waveguide is prepared at different wavelengths to investigate and measure the propagation loss and the efficiency. The results show that high efficiency is maintained at a stirring time of 48 hours at 630nm.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::58365eef7301ff255bec7a083ef256a9
https://doi.org/10.1364/fio.2022.jw5a.9
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4
Photolithography of Nanophotonic Lithium Niobate Films Optical Strip Waveguide
Autor: Evan T. Salim, Makram A. Fakhri, Ahmed C. Kadhim, Ahmad S. Azzahrani, Forat H. Alsultany
Publikováno v: Frontiers in Optics + Laser Science 2022 (FIO, LS).
In this part, the process of preparing LiNbO3 in the laboratory is defined. The morphological analysis showed that a particle size of the deposited nanomaterials could be found in the range of 30-130nm.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4be37442dca85a0869b3fa0a372dcd94
https://doi.org/10.1364/fio.2022.jw5a.75
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5
Nano-Photonic LiNbO3 Optical Waveguide Thickness Based on Stirring Time
Autor: Makram A. Fakhri, Evan T. Salim, Ahmad S. Azzahrani, Ahmed C. Kadhim, Forat H. Alsultany
Publikováno v: Frontiers in Optics + Laser Science 2022 (FIO, LS).
In this article, a high-quality LiNbO3 thin film i s p repared u nder different stirrer times using Sol – Gel method. The results show that the longer the time the samples annealed, the thicker sample is obtained.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b13766b57ccc9a59cd748f2d8d918d40
https://doi.org/10.1364/fio.2022.jw5a.11
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6
Effect of Temperature on the Efficiency of Thin Film Amorphous Silicon Tandem Heterojunction Solar Cells with AFORS-HET
Autor: Muhammad Riaz, Ahmad S. Azzahrani, Ahmed C. Kadhim
Publikováno v: Frontiers in Optics / Laser Science.
Simulation and design of a-SiC/a-Si(i)/a-Si:H/ and a-SiC/a-Si(i)/a-SiGe:H solar cells are investigated and optimized. The maximum efficiency is achieved by changing temperature up to 400K.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::269ebfc6293657024c8639793e66d4a9
https://doi.org/10.1364/fio.2018.jtu2a.27
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7
An Approach to Improve Temporal Response of Single Photon Avalanche Photodiode for Time-resolved Diffuse Optical Tomography (DOT)
Autor: Ahmad S. Azzahrani, Susan K. Earles, Ahmed C. Kadhim
Publikováno v: Biophotonics Congress: Biomedical Optics Congress 2018 (Microscopy/Translational/Brain/OTS).
A proposed approach of single photon avalanche photodiode based time-resolved DOT is introduced. It is supported by mathematical model of dark count rate as a function of gating voltage to further improve the DOT features
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ef82e781eb2e8534af43678c9a9108b6
https://doi.org/10.1364/translational.2018.jw3a.26
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8
Computational Modeling of InGaAs/InP Single Photon Detector for High Sensitive Applications
Autor: Saud Alanzi, Ahmed C. Kadhim, Ahmad S. Azzahrani, Ahmad Alalyani
Publikováno v: ResearcherID
An approached to define output current of single photon avalanche photodiode (SPAD) is introduced using a mathematical formula. The mathematical steps and derivations are shown that the dependency of SPAD on gating signals.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a85d42fe60afdccb6f7d0ac3f1e0664
https://doi.org/10.1364/fio.2018.jtu3a.52
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10
Solitary vs Gaussian Waves Gating of InGaAs/InP Avalanche Photodiode to Stabilize Dark Count Rate as Excess Voltage Increases
Autor: Ahmed C. Kadhim, Susan K. Earles, Muhammad Riaz, Ahmad S. Azzahrani
Publikováno v: Biophotonics Congress: Biomedical Optics Congress 2018 (Microscopy/Translational/Brain/OTS).
A mathematical model for dark count rate of soliton gated InGaAs/InP SPAD is developed. Results are compared with published experimental counts of Gaussian gating. Simulation results show DCR is not affected by increasing VEX.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::572259c17008138222f411d1626e48c8
https://doi.org/10.1364/translational.2018.jth3a.35
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