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Numerical modelling of Fabry–Pérot cavities for integrated photonics: Investigating material-dependent tunability via a-Si:H and Si3N4 Bragg mirrors
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This work investigates the use of hydrogenated amorphous silicon (a-Si:H) as a high-refractive-index material for quarter-wave distributed Bragg reflectors (DBRs) in photonic applications. In comparison to Si3N4, a-Si:H enables enhanced optical confinement, broader omnidirectional reflectance, and improved figures of merit, including higher Purcell and quality factors, while minimizing mirror complexity. To evaluate the practical impact of these advantages, a theoretical comparison is conducted between Fabry–Pérot cavities based on a-Si:H/SiO2 and Si3N4/SiO2 DBRs, examining resonance shifts as functions of cavity refractive index (1.0–3.0) and temperature (0–250 °C). The numerical results indicate that Si3N4/SiO2 planar Bragg cavities exhibit a low thermal shift of 0.01–0.03 nm/°C and moderate refractive index sensitivity of approximately 1–10 nm/RIU, confirming their high spectral stability. In contrast, a-Si:H/SiO2 mirrors exhibit higher thermal tunability (0.03–0.1 nm/°C) and increased refractive index sensitivity (10–30 nm/RIU), making them highly suitable for sensing and tunable photonic applications

Publication Date
Tue Jan 01 2019
Journal Name
Ieee Access
Sensing Performance of Modified Single Mode Optical Fiber Coated With Nanomaterials-Based Ammonia Sensors Operated in the C-Band
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Publication Date
Sun Jan 01 2023
Journal Name
The Egyptian Journal Of Hospital Medicine
Effect of Good Hygiene Practices on E. coli O157:H7 Contamination in Some Al-‎Karkh Area Restaurants, Baghdad, Iraq
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Crossref
Publication Date
Mon Jan 15 2018
Journal Name
Pollution Research
STUDY THE EFFECT OF THE WAVES EMITTED FROM TOWERS COMMUNICATION IN SOME BIOLOGICAL STANDERDS FROM DIFFERENT REGIONS IN BAGHDAD
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The mobile phone has become one of the most important in our days. The effects of waves from mobile base station may cause health effects on human. The aim of this work was to study the effect of radiofrequency (RF) emitted from mobile base station on the hemoglobin (Hb), packed cell (PCV), white blood cells (WBC) and liver enzymes activity including glutamic oxaloacetic transaminase (GOT), glutamic pyruvie transaminase (GPT) and Alkaline phosphatase (ALP). In this study the people divided into control group who living away from mobile base station and experimental group who living near to the mobile base station. The present result found there is no significant differences (P<0.05) in the Hb and PCV, but there was a significant increases (

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Publication Date
Sun Dec 06 2009
Journal Name
Baghdad Science Journal
The influence of He-Ne Laser (632.8 nm) on Candida albicans isolated from complete upper dentures: In vitro study
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The main objective of this study is to determine whether the use of He-Ne Laser (632.8 nm wavelength and power 0.5 mW) is an eligible and effective tool to kill or reduce the cell viability of Candida albicans isolated from complete upper dentures. Twenty one swabs were taken from the complete upper dentures. Only six swabs showed positive cultures for C. albicans. The isolate was divided into two groups, group I was not irradiated (control), and group II was irradiated by He-Ne Laser for different periods (10, 15, 20, and 30) min. After irradiation, the results showed a significant reduction in the viable cell count and colonies diameters especially at exposure periods 10 and 15 min. Although the low power He-Ne Laser was not eradicating t

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Publication Date
Thu Jan 04 2024
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
The impact of agricultura insuranc risk management in achieving the economic development: Applied research in the National Insurance Company
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Abstract                                                    

           The research aims to investigate the existence of correlations and influence between agricultural insurance risk management and economic development in the National Insurance Company with farmers, as agriculture is one of the leading branches of the national economy, ensuring food security and eliminating poverty to ensure sustainable ec

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Publication Date
Mon Aug 08 2022
Journal Name
Archives Of Phytopathology And Plant Protection
First molecular confirmation of the fungus <i>Leveillula taurica</i> causing powdery mildew disease on sweet pepper in Iraq
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Publication Date
Tue Dec 01 2015
Journal Name
Journal Of Economics And Administrative Sciences
The Role of Green Productivity to Success the industrial organizations Applied Study in Midland Refineries Company – Al Daura Refinery
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      The Green Productivity topic is considered as one of  the more conceptual novelty in the field of Production and Operations Management, and one of the least topics addressed in the literature competent, Green Productivity (GP) is a strategy for enhancing a business's Productivity and environmental performance at the same time, for overall socio - economic development, It is  the application of appropriate techniques , technologies , and management systems to produce environmentally compatible goods and services. the research aimed to find the contribution of this concept for success the industrial Organizations.

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Publication Date
Sun May 31 2026
Journal Name
Journal Of The Iraqi University
THE ROLE OF STRATEGIC AMBIGUITY IN BUILDING THE CUSTOMER’S MENTAL IMAGE: AN EXPLORATORY RESEARCH IN THE NATIONAL INSURANCE COMPANY
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Publication Date
Thu Dec 15 2022
Journal Name
Journal Of Petroleum Research And Studies
Selection of an Optimum Drilling Fluid Model to Enhance Mud Hydraulic System Using Neural Networks in Iraqi Oil Field
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In drilling processes, the rheological properties pointed to the nature of the run-off and the composition of the drilling mud. Drilling mud performance can be assessed for solving the problems of the hole cleaning, fluid management, and hydraulics controls. The rheology factors are typically termed through the following parameters: Yield Point (Yp) and Plastic Viscosity (μp). The relation of (YP/ μp) is used for measuring of levelling for flow. High YP/ μp percentages are responsible for well cuttings transportation through laminar flow. The adequate values of (YP/ μp) are between 0 to 1 for the rheological models which used in drilling. This is what appeared in most of the models that were used in this study. The pressure loss

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Publication Date
Fri Jul 24 2020
Journal Name
Indian Journal Of Forensic Medicine &amp; Toxicology
The Incidence of Hepatitis C Virus Infections among People Screened in Governmental Health Care Facilities in 2018 in Iraq
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