Talal Ghannam - Academia.edu (original) (raw)
Papers by Talal Ghannam
Journal of Alloys and Compounds, 2010
A new TiO2 photocatalyst was sensitized with benzidine yellow G by solvothermal synthesis method ... more A new TiO2 photocatalyst was sensitized with benzidine yellow G by solvothermal synthesis method and characterized by SEM, XRD and FT-IR. The photocatalytic activity and kinetics of the composite were investigated by the photocatalytic degradation of methylene blue, neutral red and xylenol orange under the visible light irradiation. The results show that the photoresponse of TiO2 has been extended from ultraviolet to visible region. The degradation rate of the three dyes reached to 72-96 %. The kinetics of the photocatalytic degradation process of methylene blue was also been discussed and well conformed to the Langmuir-Hinshelwood kinetics model.
The concept of waves is very fundamental to classical and modern physics alike, being essential i... more The concept of waves is very fundamental to classical and modern physics alike, being essential in describing light, sound, and elementary particles, among many other phenomena. In this paper, we show that the wave/particle duality is a phenomenon manifested not only in the physical world and the mathematics that describes it, but also in the simple numbers that form the basic matrix upon which most of our sciences rest. We will also show how this wave-based approach to numbers could be essential to our understanding of the mathematical and physical constants that govern the physical laws as well as the natural elements emerging from them.
It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from o... more It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from one to infinity are distributed around polygons having sides that are integer multiple of number 6. In this paper, we will show that not only prime numbers occupy these moduli, but non-prime numbers sharing these same moduli have unique prime-ness properties. When utilizing digital root methodologies, these non-prime numbers provide a novel method to accurately identify prime numbers and prime factors without trial division or probabilistic-based methods. We will also show that the icositetragon (24-sided regular polygon) is a unique polygon pertaining to prime numbers and their ultimate incidence and distribution.
Optik - International Journal for Light and Electron Optics, 2015
ABSTRACT In this paper I investigate the effect that a quantized electric field will have on the ... more ABSTRACT In this paper I investigate the effect that a quantized electric field will have on the surface plasmons of nano particle embedded within PBG material and excited by a two-level system. This study will show that when the external field is fully quantized, a new term will contribute to the damping constant of the radiation emitted from the nano particle. This term does not emerge from the system when the electric field is treated classically. Even though this extra term should increase the line width of the light emitted from the system, nevertheless, the overall effect of the external field is to reduce the line width of the emitted light. I also investigate the ability of the system to work as a plasmonic photo-sensor.
Physical Review A, 2009
ABSTRACT In this paper we undertake a theoretical study of the quantum properties of a dipole nan... more ABSTRACT In this paper we undertake a theoretical study of the quantum properties of a dipole nanolaser proposed by Protsenko et al. Phys. Rev. A 71 063812 (2005)]. The dynamics of the system is studied in both density-matrix and quantum Langevin formulations, with attention directed to noise sources. The result of the analysis indicates that in the most directly accessible parameter regime, photons will be emitted in a broad spectral distribution and the time delay between consecutive emissions of single photons exceeds the coherence time. Another parameter regime exists within which the emitted light more closely resembles conventional laser light.
Physical Review A, 2012
ABSTRACT This paper demonstrates how we can generate coherent light of lasing characteristics fro... more ABSTRACT This paper demonstrates how we can generate coherent light of lasing characteristics from a system made of a two-level system and a nanoparticle. The lasing is achieved by embedding the whole system in a polaritonic band-gap material. The study is conducted on silver nanoparticles embedded within silicon carbide.
Journal of the Optical Society of America B, 2008
Journal of Physics B: Atomic, Molecular and Optical Physics, 2010
ABSTRACT Using the Langevin formalism we study the effects an external electromagnetic field indu... more ABSTRACT Using the Langevin formalism we study the effects an external electromagnetic field induces in a system made of a pumped two-level system (TLS) and a metallic nano-particle (NP) that interact together via their near-fields. The surface plasmons of the NP greatly enhance the scattered light. With the absence of the external EM field the spectral width of the scattered light is broader than that of the system, covering almost the entire optical range. However, with the inclusion the external EM field, a reduction in the spectral width of the scattered light of order of 10–50 times below that of the system is observed for certain parameter regimes.This system exhibits also bistability in the population difference of the TLS with the external field acting as an order parameter, but only for certain values of the noise quanta.
![Research paper thumbnail of Corrigendum to “Investigation of photocatalytic activity and UV-shielding properties for silica coated titania nanoparticles by solvothermal coating” [J. Alloys Compd. 508 (2010) L1–L4]](https://attachments.academia-assets.com/83326026/thumbnails/1.jpg)
](Journal of Alloys and Compounds, 2013
Applied Optics, 2013
This paper investigates a specific kind of solitary pulse, the modulated zero-area (MZA) solitary... more This paper investigates a specific kind of solitary pulse, the modulated zero-area (MZA) solitary pulse, when propagating within MgO photonic bandgap medium doped with silver nanoparticles (NPs). It will be shown that two coupled MZA pulses do propagate unattenuated within this medium but for a certain combination of the dipole moments and the density of the NPs. More important, and in contrast to the other kinds of solitary pulses, one of the two MZA pulses exhibits a slowing in its group velocity in comparison to the other one, depending on the amplitudes of the components of the dipole moments of the NPs that are in resonance with the two MZA pulses. With this particular feature, the system has the potential of working as an all-optical switch.
We propose a novel class of spirals that are based on perfect polygonal formations. The spirals a... more We propose a novel class of spirals that are based on perfect polygonal formations. The spirals are defined by a fractal of right triangles that delineate their geometry and determine their progression rates and modes. We show how these spirals match naturally occurring ones, including hurricanes and galaxies, much better than already proposed models, allowing for more accurate categorization of these phenomena and better prediction of their physical properties.
arXiv: General Mathematics, 2019
It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from o... more It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from one to infinity are distributed around polygons having sides that are integer multiple of number 6. In this paper, we will show that not only prime numbers occupy these moduli, but non-prime numbers sharing these same moduli have unique prime-ness properties. When utilizing digital root methodologies, these non-prime numbers provide a novel method to accurately identify prime numbers and prime factors without trial division or probabilistic-based methods. We will also show that the icositetragon (24-sided regular polygon) is a unique polygon pertaining to prime numbers and their ultimate incidence and distribution.
ABSTRACT In this paper we outline the main quantum properties of the system of nano-based laser c... more ABSTRACT In this paper we outline the main quantum properties of the system of nano-based laser called Dipole Nano-Laser emphasizing mainly on its ability to produce coherent light and for different configurations such as different embedding materials and subjecting it to an external classical electric field.
Journal of Alloys and Compounds, 2010
A new TiO2 photocatalyst was sensitized with benzidine yellow G by solvothermal synthesis method ... more A new TiO2 photocatalyst was sensitized with benzidine yellow G by solvothermal synthesis method and characterized by SEM, XRD and FT-IR. The photocatalytic activity and kinetics of the composite were investigated by the photocatalytic degradation of methylene blue, neutral red and xylenol orange under the visible light irradiation. The results show that the photoresponse of TiO2 has been extended from ultraviolet to visible region. The degradation rate of the three dyes reached to 72-96 %. The kinetics of the photocatalytic degradation process of methylene blue was also been discussed and well conformed to the Langmuir-Hinshelwood kinetics model.
The concept of waves is very fundamental to classical and modern physics alike, being essential i... more The concept of waves is very fundamental to classical and modern physics alike, being essential in describing light, sound, and elementary particles, among many other phenomena. In this paper, we show that the wave/particle duality is a phenomenon manifested not only in the physical world and the mathematics that describes it, but also in the simple numbers that form the basic matrix upon which most of our sciences rest. We will also show how this wave-based approach to numbers could be essential to our understanding of the mathematical and physical constants that govern the physical laws as well as the natural elements emerging from them.
It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from o... more It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from one to infinity are distributed around polygons having sides that are integer multiple of number 6. In this paper, we will show that not only prime numbers occupy these moduli, but non-prime numbers sharing these same moduli have unique prime-ness properties. When utilizing digital root methodologies, these non-prime numbers provide a novel method to accurately identify prime numbers and prime factors without trial division or probabilistic-based methods. We will also show that the icositetragon (24-sided regular polygon) is a unique polygon pertaining to prime numbers and their ultimate incidence and distribution.
Optik - International Journal for Light and Electron Optics, 2015
ABSTRACT In this paper I investigate the effect that a quantized electric field will have on the ... more ABSTRACT In this paper I investigate the effect that a quantized electric field will have on the surface plasmons of nano particle embedded within PBG material and excited by a two-level system. This study will show that when the external field is fully quantized, a new term will contribute to the damping constant of the radiation emitted from the nano particle. This term does not emerge from the system when the electric field is treated classically. Even though this extra term should increase the line width of the light emitted from the system, nevertheless, the overall effect of the external field is to reduce the line width of the emitted light. I also investigate the ability of the system to work as a plasmonic photo-sensor.
Physical Review A, 2009
ABSTRACT In this paper we undertake a theoretical study of the quantum properties of a dipole nan... more ABSTRACT In this paper we undertake a theoretical study of the quantum properties of a dipole nanolaser proposed by Protsenko et al. Phys. Rev. A 71 063812 (2005)]. The dynamics of the system is studied in both density-matrix and quantum Langevin formulations, with attention directed to noise sources. The result of the analysis indicates that in the most directly accessible parameter regime, photons will be emitted in a broad spectral distribution and the time delay between consecutive emissions of single photons exceeds the coherence time. Another parameter regime exists within which the emitted light more closely resembles conventional laser light.
Physical Review A, 2012
ABSTRACT This paper demonstrates how we can generate coherent light of lasing characteristics fro... more ABSTRACT This paper demonstrates how we can generate coherent light of lasing characteristics from a system made of a two-level system and a nanoparticle. The lasing is achieved by embedding the whole system in a polaritonic band-gap material. The study is conducted on silver nanoparticles embedded within silicon carbide.
Journal of the Optical Society of America B, 2008
Journal of Physics B: Atomic, Molecular and Optical Physics, 2010
ABSTRACT Using the Langevin formalism we study the effects an external electromagnetic field indu... more ABSTRACT Using the Langevin formalism we study the effects an external electromagnetic field induces in a system made of a pumped two-level system (TLS) and a metallic nano-particle (NP) that interact together via their near-fields. The surface plasmons of the NP greatly enhance the scattered light. With the absence of the external EM field the spectral width of the scattered light is broader than that of the system, covering almost the entire optical range. However, with the inclusion the external EM field, a reduction in the spectral width of the scattered light of order of 10–50 times below that of the system is observed for certain parameter regimes.This system exhibits also bistability in the population difference of the TLS with the external field acting as an order parameter, but only for certain values of the noise quanta.
Journal of Alloys and Compounds, 2013
Applied Optics, 2013
This paper investigates a specific kind of solitary pulse, the modulated zero-area (MZA) solitary... more This paper investigates a specific kind of solitary pulse, the modulated zero-area (MZA) solitary pulse, when propagating within MgO photonic bandgap medium doped with silver nanoparticles (NPs). It will be shown that two coupled MZA pulses do propagate unattenuated within this medium but for a certain combination of the dipole moments and the density of the NPs. More important, and in contrast to the other kinds of solitary pulses, one of the two MZA pulses exhibits a slowing in its group velocity in comparison to the other one, depending on the amplitudes of the components of the dipole moments of the NPs that are in resonance with the two MZA pulses. With this particular feature, the system has the potential of working as an all-optical switch.
We propose a novel class of spirals that are based on perfect polygonal formations. The spirals a... more We propose a novel class of spirals that are based on perfect polygonal formations. The spirals are defined by a fractal of right triangles that delineate their geometry and determine their progression rates and modes. We show how these spirals match naturally occurring ones, including hurricanes and galaxies, much better than already proposed models, allowing for more accurate categorization of these phenomena and better prediction of their physical properties.
arXiv: General Mathematics, 2019
It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from o... more It is known that prime numbers occupy specific geometrical patterns or moduli when numbers from one to infinity are distributed around polygons having sides that are integer multiple of number 6. In this paper, we will show that not only prime numbers occupy these moduli, but non-prime numbers sharing these same moduli have unique prime-ness properties. When utilizing digital root methodologies, these non-prime numbers provide a novel method to accurately identify prime numbers and prime factors without trial division or probabilistic-based methods. We will also show that the icositetragon (24-sided regular polygon) is a unique polygon pertaining to prime numbers and their ultimate incidence and distribution.
ABSTRACT In this paper we outline the main quantum properties of the system of nano-based laser c... more ABSTRACT In this paper we outline the main quantum properties of the system of nano-based laser called Dipole Nano-Laser emphasizing mainly on its ability to produce coherent light and for different configurations such as different embedding materials and subjecting it to an external classical electric field.