Staff Publications- Faculty of Science: Recent submissions
Now showing items 1-20 of 1066
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Optical fiber surrounded by a graphene layer as an optical sensor
(Springer Science and Business Media LLC, 2020-03)"An optical sensor composed of a circular cylindrical fber surrounded by graphene layer is investigated. The thin layer of graphene is located at the core–cladding interface. The cladding is an aqueous material. The ... -
Refractometric sensor based on slab waveguides of simultaneously negative permittivity and permeability materials
(Springer Science and Business Media LLC, 2020-12)"A four-layer slab waveguide is treated analytically for optical sensing purposes. The layers of the waveguide are substrate, thin flm and cladding. Another layer is introduced between the substrate and the flm which is ... -
Properties of a binary photonic crystal with an inverted symmetry and a defect layer
(Springer Science and Business Media LLC, 2020-11)In the current work, two binary photonic crystals (BPCs) are investigated and compared. The first is composed of two layers A and B repeated 2 N times. In the first N-repetitions, they have the order AB and in the next ... -
Highly Sensitive Refractive Index Sensor for Temperature and Salinity Measurement of Seawater
(Elsevier BV, 2020-08)"This article proposed a dual-core microstructure optical sensor based on Photonic Crystal Fiber (PCF) for measuring the temperature and salinity sensitivity. The smallest hole is injected with seawater as an analyte core ... -
One-dimensional ring mirror-defect photonic crystal for detection of mycobacterium tuberculosis bacteria
(Elsevier BV, 2020-10)The work describes the refractive index sensor which can be used particularly for tuberculosis blood samples. The possibility of this approach is pertained by the ring core periodic structure of photonic crystal (PC) ... -
Design of a slab waveguide using a graded index profile and a left hand material
(Elsevier BV, 2019-07)"In the present paper, we consider a pulse propagation in a slab waveguide structure having three layers. The guiding layer is assumed to have a linearly graded-index profile. Maxwell's equations are solved in the three layers ... -
Properties of ternary photonic crystal consisting of dielectric/plasma/dielectric as a lattice period
(Elsevier BV, 2019-05)"Ternary photonic crystals have shown a superior performance over the binary ones. In this work, a ternary photonic crystal which has the structure dielectric/plasma/ dielectric is considered. Transmission through the ... -
Analysis of photonic band gap in photonic crystal with epsilon negative and double negative materials
(Elsevier BV, 2019-04)"The transmission properties of one-dimensional binary and ternary photonic crystals are theoretically investigated using transfer matrix method. The binary structure is composed of alternate layers of epsilon-negative and ... -
Transverse magnetic mode slab waveguide optical sensor in the presence of conducting interfaces
(Elsevier BV, 2019-02)"In this paper, three –layer slab waveguide is considered for the p-polarization whose free charge layer with a surface conductivity is assumed to exist at the two interfaces. The structure is then enhanced for sensing ... -
Capacitance-voltage measurements of hetero-layer OLEDs treated by an electric field and thermal annealing
(Natural Sciences publishing, 2021)"Abstract: Capacitance-voltage (C-V) characterization of organic light-emitting diodes (OLEDs) having the structure ITO/ PVK (poly (9-Vinylcarbazole)/Rhodamine B dye/Pb is reported. The C-V curves provide more understanding ... -
Enhancement of optical visible wavelength region selective reflector for photovoltaic cell applications using a ternary photonic crystal
(Elsevier BV, 2021-10)" In a recent study, the authors proposed an optical broadband angular reflector having a band selective feature and high reflectivity rate for possible applications in photovoltaic applications using a binary photonic ... -
Properties of band gap for p-polarized wave propagating in a binary superconductor-dielectric photonic crystal
(Elsevier BV, 2021-10)" A photonic crystal (PC) having the structure (AB)NA is investigated. A and B are superconductor and dielectric layers, respectively. P-polarized (TM) wave is assumed to be incident on the PC. The transmission of TM ... -
Cancer cell detector based on a slab waveguide of anisotropic, lossy, and dispersive left-handed material
(The Optical Society, 2021-09-20)"Cancer is a disease that takes place when human cells grow uncontrollably. When detected and cured early, it can be non-life-threatening. It becomes life-threatening in case of late discovery where it affects the ability ... -
Dispersion curves of a slab waveguide with a nonlinear covering medium and an exponential graded-index thin film (transverse magnetic case)
(The Optical Society, 2021-11-01)"A slab waveguide that comprises a linear substrate, an exponentially graded-index guiding layer, and a power- dependent refractive index covering medium is investigated. All layers are assumed dielectric. The guiding ... -
Surface plasmon resonance-based optical sensor using a thin layer of plasma
(The Optical Society, 2021-08-01)"We propose a surface plasmon resonance (SPR) biosensor that consists of six layers: glass prism (SF 10), chromium, metal, molybdenum disulphide, graphene, and sensing medium. A seventh layer is added between the glass ... -
Dispersion properties of slab waveguides with a linear graded-index film and a nonlinear substrate
(Springer Science and Business Media LLC, 2021-07)" Three-layer slab waveguide with a graded-index film and a nonlinear substrate is investigated. The nonlinear substrate is considered of Kerr-type and the film index is assumed to change linearly as we move from the ... -
An ultra-high birefringent and nonlinear decahedron photonic crystal fiber employing molybdenum disulphide (MoS2): A numerical analysis
(Elsevier BV, 2021-08)"A novel Decahedron photonic crystal fiber (DHn-PCF) is proposed. To sustain high birefringence and nonline- arity, the central elliptical core is filled with a highly nonlinear 2D material molybdenum disulphide (MoS2). ... -
Analysis of proposed PCF with square air hole for revolutionary high birefringence and nonlinearity
(Elsevier BV, 2021-02)"A novel square shaped air hole based photonic crystal fiber (PCF) is proposed with three symmetrical rectangular slots in the core region. A highly nonlinear material Gallium phosphide (GaP) is doped in the middle ... -
Modelling of three tunable multichannel filters using Ag metal as a defect layer in a photonic crystal
(Springer Science and Business Media LLC, 2021-11)"Three optical multi-color flters are modelled in the current work. They are composed of defective photonic crystals of two layers A and B and a defect layer C which is selected as silver Ag. The three multi-color flters ... -
Primary Ideals of Lie Algebras
(palestine journal of mathematics, 2021-01-11)In this paper, we introduce and advance the basic theory of primary ideals for Lie algebras and investigate their properties in details illustrated by several examples. We give some characterizations for ideals to be primary ...