Moustafa Ahmed
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View article: Transition Metal Nitrides as High-Performance, Cost-Effective Alternatives to Noble Metals in Surface Plasmon Resonance Sensing
Transition Metal Nitrides as High-Performance, Cost-Effective Alternatives to Noble Metals in Surface Plasmon Resonance Sensing Open
View article: Clinical and Radiographic assessment of Dental Occlusion after Surgical Management of Maxillary and/or Mandibular Fractures
Clinical and Radiographic assessment of Dental Occlusion after Surgical Management of Maxillary and/or Mandibular Fractures Open
View article: Plasmon-Driven Hot-Electron for Doping 2d Materials Via Gold and Titanium Nitride Nanoparticles
Plasmon-Driven Hot-Electron for Doping 2d Materials Via Gold and Titanium Nitride Nanoparticles Open
View article: Photo-detection evaluation of an <i>n</i> -WO <sub>3</sub> /p-Si heterostructure for visible wavelength detection
Photo-detection evaluation of an <i>n</i> -WO <sub>3</sub> /p-Si heterostructure for visible wavelength detection Open
WO 3 /Si heterostructure for visible wavelength detection: influence of laser fluence.
View article: Dielectric-Metal Nitride Core-Shell Plasmonic Nanostructures for Photo-Absorption and Photothermal Conversion of Solar Radiation
Dielectric-Metal Nitride Core-Shell Plasmonic Nanostructures for Photo-Absorption and Photothermal Conversion of Solar Radiation Open
View article: RETRACTED: Ahmed et al. Thermal Analysis of a Metal–Organic Framework ZnxCo1-X-ZIF-8 for Recent Applications. Polymers 2021, 13, 4051
RETRACTED: Ahmed et al. Thermal Analysis of a Metal–Organic Framework ZnxCo1-X-ZIF-8 for Recent Applications. Polymers 2021, 13, 4051 Open
The journal retracts the article “Thermal Analysis of a Metal–Organic Framework ZnxCo1-X-ZIF-8 for Recent Applications” [...]
View article: Optimizing Continuous Wave Semiconductor Laser toward Achieving (100’s) mW Power for Use in Medical Application: Theoretical Work
Optimizing Continuous Wave Semiconductor Laser toward Achieving (100’s) mW Power for Use in Medical Application: Theoretical Work Open
Diode laser is very efficient in medical applications, especially in photodynamic therapy (PDT), a type of laser phototherapy. Conventional laser diodes are classified as low-power lasers that emit laser radiation with a power of few 10s-m…
View article: Analytical Solution of Rate Equations Including Frequency Chirp of Modulated Quantum-Well Laser with Carrier Transport Processes
Analytical Solution of Rate Equations Including Frequency Chirp of Modulated Quantum-Well Laser with Carrier Transport Processes Open
When used as light sources in modern fiber communication systems, the modulation bandwidth and chirp are crucial characteristics of high-speed quantum well (QW) lasers. These parameters are primarily constrained by two factors; namely, the…
View article: Optimizing the performance of high-speed optical fiber communication systems employing multiple-quantum well lasers through dispersion- compensating fibers
Optimizing the performance of high-speed optical fiber communication systems employing multiple-quantum well lasers through dispersion- compensating fibers Open
We present a numerical modeling and simulation study on the performance of optical fiber communication systems employing a multiple-quantum-well (MQW) semiconductor laser operating at a wavelength of 1.55 μm with high bit rates ranging bet…
View article: Achieving High Power Continuous Wave and Short Pulses of Semiconductor Laser for Use in Photodynamic Therapy
Achieving High Power Continuous Wave and Short Pulses of Semiconductor Laser for Use in Photodynamic Therapy Open
Semiconductor laser (SCL) is a promising light source in photodynamic therapy (PDT). Overcoming the limitation of the low-penetration depth of PDT and hence enhancing its therapeutic effect by adding a hyperthermia factor to the cancer tre…
View article: Enhanced high-frequency modulation of single-mode 850nm VCSELs via dual transverse-cavity integration
Enhanced high-frequency modulation of single-mode 850nm VCSELs via dual transverse-cavity integration Open
This paper introduces an innovative design for double-transverse-coupled-cavity (DTCC) VCSELs aimed at achieving high-speed modulations exceeding 21GHz with single mode operations. The lateral in-plane optical feedback across both cavities…
View article: Towards Developing Mid-Infrared Photonics Using Mxenes
Towards Developing Mid-Infrared Photonics Using Mxenes Open
Recent research and development in the mid-infrared (IR) wavelength range (2-20 um) for a variety of applications, such as trace gas monitoring, thermal imaging, and free space communications have shown tremendous and fascinating progress.…
View article: Films of copper sulphide doped with nickel for optoelectronics: structural, optical, and magnetic characteristics
Films of copper sulphide doped with nickel for optoelectronics: structural, optical, and magnetic characteristics Open
Copper sulfide nanoparticles have a wide range of applications in various fields, and improving their physical properties is highly desirable. In this study, we investigate the influence of nickel concentrations on the structural, optical,…
View article: Investigations into the structural, morphology and optoelectronics properties of the CdO:Cu films produced by spray pyrolysis
Investigations into the structural, morphology and optoelectronics properties of the CdO:Cu films produced by spray pyrolysis Open
This study used spray pyrolysis to create CdO films that were undoped and doped with Cu at varied concentrations (0, 1, 2, 3, 4 and 5%). The materials' polycrystalline cubic nature is confirmed by XRD examination. Rietveld refinement was u…
View article: Reconstruction of Scalp Defects: A Meta-Analysis Study
Reconstruction of Scalp Defects: A Meta-Analysis Study Open
Background: Scalp deficiencies can be caused by a number of different etiological reasons, including tumor extirpation, infection, burns, or trauma to this special region of the human body. The scalp can be reconstructed in a number of way…
View article: Resulting Effect of the p-Type of ZnTe: Cu Thin Films of the Intermediate Layer in Heterojunction Solar Cells: Structural, Optical, and Electrical Characteristics
Resulting Effect of the p-Type of ZnTe: Cu Thin Films of the Intermediate Layer in Heterojunction Solar Cells: Structural, Optical, and Electrical Characteristics Open
The microstructural, electrical, and optical properties of Cu-doped and undoped ZnTe thin films grown on glass substrates are covered in this article. To determine the chemical makeup of these materials, both energy-dispersive X-ray (EDAX)…
View article: Structural, Optical, Electric and Magnetic Characteristics of (In1−xGdx)2O3 Films for Optoelectronics
Structural, Optical, Electric and Magnetic Characteristics of (In1−xGdx)2O3 Films for Optoelectronics Open
After (In1−xGdx)2O3 powder with a wide x range of 0 to 10 at.% was chemically produced, (In1−xGdx)2O3 thin films were evaporated under ultra-vacuum using an electron beam apparatus. We investigated the influence of the Gd doping concentrat…
View article: Effect of linewidth enhancement factor of laser diode and fiber dispersion management on high-speed optical fiber links performance and use in WDM systems
Effect of linewidth enhancement factor of laser diode and fiber dispersion management on high-speed optical fiber links performance and use in WDM systems Open
We present a numerical simulation study on the effect of the linewidth enhancement factor (α) of semiconductor laser and dispersion management methods of optical fibers on the performance of 40-Gb/s directly-modulated fiber links and their…
View article: Effect of fiber properties and dispersion management on distortions associated with two subcarriers modulation of laser diode in radio over fiber systems
Effect of fiber properties and dispersion management on distortions associated with two subcarriers modulation of laser diode in radio over fiber systems Open
We present numerical modeling and simulation on the effects of standard single-mode fiber (SSMF) properties and different dispersion management approaches on the distortions of laser diode. These distortions are associated with the two-ton…
View article: Plasmon Resonances of Graphene-Assisted Core-Bishell Nanoparticles
Plasmon Resonances of Graphene-Assisted Core-Bishell Nanoparticles Open
We study the Localized Surface Plasmon Resonance (LSPR) in graphene-assisted core-bishell nanoparticles which consists of a graphene layer (outer shell) wrapped around a metal shell and either a dielectric or metal core. Small nanoparticle…
View article: Thermal analysis and non-isothermal crystallization kinetic of PET/UiO-66 nanocomposite
Thermal analysis and non-isothermal crystallization kinetic of PET/UiO-66 nanocomposite Open
The thermal and crystallization properties of poly (ethylene terephthalate) (PET) in the presence of metal–organic frameworks (MOFs) such as UiO-66(Zr) have been systematically studied. Under the best conditions, UiO-66(Zr) functions as a …
View article: Fabrication of Lead Free Borate Glasses Modified by Bismuth Oxide for Gamma Ray Protection Applications
Fabrication of Lead Free Borate Glasses Modified by Bismuth Oxide for Gamma Ray Protection Applications Open
In the present work, bismuth borate glass samples with the composition of (99-x) B2O3 + 1Cr2O3 + (x) Bi2O3 (x = 0, 5, 10, 15, 20, and 25 wt %) were prepared using the melt quenching technique. The mass attenuation coefficient (MAC) of the …
View article: Thermal Stability Criteria and Crystallization Kinetic Acceleration of Pet/Uio-66 Nanocomposite Under Non-Isothermal Conditions
Thermal Stability Criteria and Crystallization Kinetic Acceleration of Pet/Uio-66 Nanocomposite Under Non-Isothermal Conditions Open
View article: On-chip nanophotonic broadband wavelength detector with 2D-Electron gas: Nanophotonic platform for wavelength detection in visible spectral region.
On-chip nanophotonic broadband wavelength detector with 2D-Electron gas: Nanophotonic platform for wavelength detection in visible spectral region. Open
Miniaturized, low-cost wavelength detectors are gaining enormous interest as we step into the new age of photonics. Incompatibility with integrated circuits or complex fabrication requirement in most of the conventionally used filters nece…
View article: Effect of Fiber Properties and Dispersion Management on Distortions Associated with Two Subcarriers Modulation of Laser Diode in Radio Over Fiber Systems
Effect of Fiber Properties and Dispersion Management on Distortions Associated with Two Subcarriers Modulation of Laser Diode in Radio Over Fiber Systems Open
View article: On-chip nanophotonic broadband wavelength detector with 2D-Electron gas
On-chip nanophotonic broadband wavelength detector with 2D-Electron gas Open
Miniaturized, low-cost wavelength detectors are gaining enormous interest as we step into the new age of photonics. Incompatibility with integrated circuits or complex fabrication requirement in most of the conventionally used filters nece…
View article: RETRACTED: Thermal Analysis of a Metal–Organic Framework ZnxCo1-X-ZIF-8 for Recent Applications
RETRACTED: Thermal Analysis of a Metal–Organic Framework ZnxCo1-X-ZIF-8 for Recent Applications Open
Zeolitic imidazolate frameworks (ZIFs) are interesting materials for use in several aspects: energy storage material, gas sensing, and photocatalysis. The thermal stability and pyrolysis process are crucial in determining the active phase …
View article: Static and dynamic characteristics of double transverse coupled cavity VCSELs for high speed modulations
Static and dynamic characteristics of double transverse coupled cavity VCSELs for high speed modulations Open
We present experimental results for extending the 3-dB modulation bandwidth of an 850-nm vertical-cavity surface-emitting laser (VCSEL) with passive double transverse-coupled cavities (DTCC). The 3-dB modulation bandwidth of DTCC-VCSEL is …
View article: VCSEL with multi-transverse cavities with bandwidth beyond 100 GHz
VCSEL with multi-transverse cavities with bandwidth beyond 100 GHz Open
To fulfill the demands of high-speed photonic applications, researchers, and engineers have been working to improve the modulation bandwidth (MBW) of semiconductor lasers. We extend our prior work on modeling a vertical-cavity surface-emit…
View article: DESIGN AND IMPLEMENTATION OF A PROMISING OPTICAL SUBSYSTEM WITH A SKY CAMERA FOR LASER WARNING SYSTEMS
DESIGN AND IMPLEMENTATION OF A PROMISING OPTICAL SUBSYSTEM WITH A SKY CAMERA FOR LASER WARNING SYSTEMS Open
In the last few decades, a Significant advance in the laser detection techniques have occurred in a civilian application like optical fiber communication system, lidar system and now satellite communication in the erospace and a military a…