Hayfa G.RahidCollege of Education ,Al-Mustansiriya University , Baghda, Iraq · PHYSICS
Hayfa G.Rahid
PhD. in OPTICS & PHTONIC CRYSTALS
About
47
Publications
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73
Citations
Citations since 2017
Introduction
Hayfa G.Rahid currently works at the PHYSICS, College of Education ,Al-Mustansiriya University , Baghda, Iraq. Hayfa does research in Mathematical Physics, Theoretical Physics and Optics. Their current project is 'Optics and Photonics'.
Publications
Publications (47)
The performance of first principles computations of nanostructured CdO and Cdo:Mg grown by spray pyrolysis method (SPM) was studied, using density functional theory (DFT)). The structural and optical behaviour with XRD and ultraviolet visible spectroscopy. DFT displayed that Cd 32 O 32 cluster and doped magnesium have cubic with rock salt structure...
Automatic smoke video detection plays an important role in saving human life and preserving the environment. In this study, digital image processing has been addressed to detect smoke. The suggested algorithm relies on detecting moving objects follows by several features based on the basic colour space RGB and HSV colour space. To find out the effi...
In this simmulation study, a fiber Bragg grating (FBG) sensor is used to partially separat a signal emitted from a laser diode (LD1), which is originally modulated with a noise source. Separation done into two parts; reflected, in which a phase is interpayed (similarly to Michelson interferometry) in order to make it differ than that passed without...
Mixed dielectric films of ZnS and MgF 2 have been modeled in IR (3μm) band to reduce a reflectance from ZnS substrate which is around 14%. Reflectance value are enhanced starting from a mixed quarter single layer, double and triple layer as innermost and intermediate layers (quarter-quarter-quarter) and (quarter-half –quarter) ARC’s. The designed l...
Nanostructured ZnO and Cd doped ZnO were deposited employing spray pyrolysis technique. Atomic force microscope and double beam spectrophotometer were utilized to study the influence of non-thermal plasma on topographical and some optical constants. AFM results indicate that the average diameter was 43.4-68.81 nm before exposure and their values wa...
The human eye natural crystalline lens becomes opaque due to cataract. For improvement of the eye vision, the crystalline lens is typically surgically removed and replaced by an intraocular lens (IOLs). The optimum design of hybrid multifocal intraocular lenses (MIOLs) implanted within the human eye model is proposed. The AR40N acrylic MIOLs materi...
The design of apochromatic systems was consider as a diffi cult task, because of the glass sorts compatibility. The optical glass manufacturers offer a wide range of sorts, so that the choice of triplet compatible glasses becomes itself an important separate problem. The paper provides a solution to select the suitable glass according to exact cond...
Thin fi lm of aluminium oxide Al 2 O 3 of 80.7 nm has been prepared using spray pyrolsis technique. Experimentally, the optical energy gap of Al 2 O 3 was within the range (2.5-3.5 eV). To achieve and estimate an accurate E g value, there was the problem in the exact selection of tangent point. To overcome this problem, Newton-Raphson method was us...
In this paper, optimum design of three classic model have been proposed, for refractive multifocal
intraocular lenses (singlet, doublet, triplet-MIOLs) implanted within human eye (Liou & Brennan model). The
analysis were carried out with ZEMAX-EE optical software through the polychromatic functions; MTF, PSF,
spot diagram and (longitudinal-, Sphero...
A no- reference quality metrics is one of the challenging fields in image quality assessment. The aim
of the research is measuring the quality of the microscope medical image such as blood smear and sample
texture, at different lightness conditions by using two types of light sources are Tungsten and LED. To find the
best light level at imaging, th...
Undoped ZnO and Cd doped ZnO thin films were deposited utilizing chemical spray pyrolysis. The effects of non-thermal plasma on the structural and optical properties were studied. XRD patterns indicate that all the deposited films were polycrystalline hexagonal structure , but the preferred orientation of un doped ZnO was (002), while for doped sam...
With the aid of ZEMAX-EE software, optimum design of multilayer dielectric
mirrors were proposed. Homogeneous dielectric materials TiO2 and SiO2 (as couple) were used
to construct the assembly of high reflecting mirror to be operate in the visible and near-IR
spectral region (400-800nm) and over angular range (0-65°) of incident of light. Result
de...
Spray pyrolysis technique (SPT) was applied to fabricate CdO films doped with tin at (0–8%) concentrations on glass substrates. Structural, morphological, and optical behaviors were inspected using X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV–Vis spectroscopy. Structural, electronic, and optical behaviors of Cd1−xOSnx alloys...
adopting simulation and smart phone applications to learn physics
Haya G.Rashid
Vitual Lab.
adopting computer simulation and smart phone applications to learn mechanics experiment for undergraduate student .
Mechanics and material properties experiment manual
Optimum high-performance long LWP-and short wave pass SWP polarizer filters are design and analysis for the first time using two different methods: analytical method and needle optimization method. New polarizer filter construction design was achieved with limited numbers of layers, steep edge, wide polarization band and undistinguished ripples in...
Optimum high-performance long LWP-and short wave pass SWP polarizer filters are design and analysis for the first time using
two different methods: analytical method and needle optimization method. New polarizer filter construction design was achieved with limited
numbers of layers, steep edge, wide polarization band and undistinguished ripples in...
In the present work ,design and analysis of the complete omnidirectional Bragg reflector are described. Transfer matrix method (TMM) was adopted to study the unique direction spectral performance of this structure for application in the infrared spectral region (8-14µm).It was shown that omnidirectional 1D- photonic bandgap could be simply evaluate...
In the present work ,design and analysis of the complete omnidirectional Bragg reflector are described. Transfer matrix method (TMM) was adopted to study the unique direction spectral performance of this structure for application in the infrared spectral region (8-14μm).It was shown that omnidirectional 1D- photonic bandgap could be simply evaluate...
![Figure 1. Plane waves incident on thin-film[27].](profile/Hayfa-Grahid/publication/328725413/figure/fig1/AS:688955993378816@1541271317033/Plane-waves-incident-on-thin-film27_Q320.jpg)
Transmission of laser optical elements has been increased when Indium tin oxide (ITO) thin film of relatively high index with different content of Sn was used to prepare ultra thin antireflection coating(ARC's) utilizing simple, low cost non-vacuum chemical spray pyrolysis technique. Two plans were established to achieve the goal: theoretical trans...
![Figure 1. Plane waves incident on thin-film[27].](profile/Hayfa-Grahid/publication/339899540/figure/fig1/AS:868518425808896@1584082337598/Plane-waves-incident-on-thin-film27_Q320.jpg)
In this study, we have found a novel relationship among spiral arm pitch angles (p) and momentum parameter of the host spiral galaxies. In this study, we measured the momentum parameter for specimen of Spitzer/IRAC 3.6 μm images of 41 spiral galaxies evaluated employing a relation(Mbulge σ*/c)where Mbulge is mass of the bulge and σ* is the stellar...
الحمد لله رب العالمين والصلاة والسلام على أشرف المرسلين محمد بن عبد الله عليه وعلى اله أفضل صلاة وأتم تسليم
((الحمــد لله الذي يسر لنا تمـام ما بدانـــــا بـه، ومن يستحق الحمـــد سواه))
يكتسب مختبر الكهربائية والمغناطيسية أهميته في إن قوانين الكهربائية والمغناطيسية تمتلك تحكما مركزيا في تشغيل الأجهزة الكهربائية كالتلفاز والمحركات الكهربائية والحاسب...
الحمد لله رب العالمين والصلاة والسلام على أشرف المرسلين محمد بن عبد الله عليه وعلى اله أفضل صلاة وأتم تسليم
((الحمــد لله الذي يسر لنا تمـام ما بدانـــــا بـه، ومن يستحق الحمـــد سواه))
يكتسب مختبر الكهربائية والمغناطيسية أهميته في إن قوانين الكهربائية والمغناطيسية تمتلك تحكما مركزيا في تشغيل الأجهزة الكهربائية كالتلفاز والمحركات الكهربائية والحاسب...
In the present work ,design and analysis of the complete omnidirectional Bragg reflector are described. Transfer matrix method (TMM) was adopted to study the unique direction spectral performance of this structure for application in the infrared spectral region (8-14µm).It was shown that omnidirectional 1D- photonic bandgap could be simply evaluate...
A theoretical investigation in the field of photonic crystals is presented through the design of "omnidirectional reflector ". Quarter wave optical thickness multilayer is well-known idea widely used to design a high reflector and one-dimensional photonic crystal. This idea was developed to establish Distributed Bragg reflector. í µí°í µí°¢í µí°...
This paper presents a detailed study of the oblique deposition effect on the morphology, structure and optical properties of ZnO nanowires (NWs) prepared by the deposition of zinc metallic films on glass substrates at different angles (0, 50 and 70°) and then oxidized in air at 650°C. Highly transparent ZnO thin films were successfully prepared by...
A novel solar concentrator systems have been designed by ZEMAX program, where the systems composed of one or two dimensions acrylic microlens arrays with and without BK7 multimode slab waveguide. Sunlight collected by each aperture of the microlens array and focus at photovoltaic cell PVC. This opens a new design space for high-efficiency systems w...
CITATIONS 3 READS 872 3 authors, including: Some of the authors of this publication are also working on these related projects: image processing View project nonlinear optical properties for nano particle doped polymery using z-scan technique View project ABSTRACT The efficiency of coupling between semiconductor laser LD and single-mode optical fib...
The efficiency of coupling between semiconductor laser LD and single-mode optical fiber SMF was increased by a microlens of an appropriate focal length placed between laser and fiber. ZEMAX software was used to optimize the design of an optical system. The employed coupling system composed LD of 1.55 μm wavelength, achromatic doublet microlens and...
Irradiance distribution of image surface has been investigated in multiple prototypes of microlens array solar concentrator by using optical design program ZEMAX in sequential and nonsequential ray tracing mode. The prototypes composed of 1-D or 2-D acrylic microlens array with and without multimode slab waveguide to concentrate sun light in photov...
To illustrate and broaden knowledge on some aspects of physics at teaching level, that is, university level and
higher level, Javaoptics applets was adopted as free software under a GNU General Public License, an open-source
license. This applet was used to shows multiple beaminterferences froma parallel dielectric thin filmand to study
the evoluti...
This paper present the computation and analysis of CIE spectral tristimulus
values X,Y and Z to estimate impurity ratios in thin film. White light
illuminationD65 and 2 º field of view were selected to study color sensation
and color matching of SnO2 thin film doped with various impurity ratios
(1,3,5 and 7%) ofCo. Results are displaced as a 1931CI...
Calculation of the electric field intensity of light incident obliquely on a single layer
of SnO2 thin-film coating of weakly absorbing material is presented.
The analysis utilizes
matrix formulas based on Abele's
formulas
from the
calculation
of reflectance and
transmittance.
Partial absorption due to a certain depth
in the prepared film...
The effect of impurity concentration ratios on the depth profile of electric field within monolayer film is
presented. SnO2 monolayer thin film material was prepared and doped with Co using spray chemical pyrolysis.
The concentration ratios of impurity were 1 %, 3 %, 5 % and 7 %. The analysis utilizes matrix formulas
based on Abele's formulas from...
The thickness variation of nanostructural CuO thin fi lm on optical parameters have
been investigated over a wide range of spectral region (300-1100nm).The dispersion equations of
the optical constants was also investigated. Results shows that by using the method of chemical
pyrolysis, nanostructural CuO thin fi lm can be achieved easily with dispe...
![Fig. 2. Long-wave pass edge filter of the design: Glass [(L/2)HMH(L/2)]...](profile/Nadir-Habubi/publication/216370706/figure/fig1/AS:668909183172610@1536491785122/Long-wave-pass-edge-filter-of-the-design-Glass-L-2HMHL-2-6-air-n-L-130-n-M_Q320.jpg)
Long-wave pass edge filter of high transmittance and wide bandpass have been designed and fabricated using on a single weakly absorbed ZnS thin film material of thickness of about 300 nm which was prepared by using the flash evaporation technique. The design was based on characteristic matrix theory, taking into account the effect of dispersion phe...
An infrared narrow bandpass filter of single half-wave cavity was designed at non-normal incidence of radiation illuminated
by collimated energy within the spectral region (8–12μm). The change in the spectral characteristic of the filter was studied
with the aid of characteristic matrix theory. Further more, needle optimization method was used to p...
This paper presents the methodology of the design of W-type antireflection coating of weakly absorption coatings for UV-region at oblique incidence of light for full-wide angle (0-90˚). The design was based on the modified characteristic matrix theory taking into account the effect of absorption and dispersion phenomena for layers and substrate. Th...
Thin films of cuprous oxide Cu2O have been prepared using spray
pyrolsis technique. Experimentally, the optical energy gap of Cu2O was
about 2.2eV. To achieve and estimate an accurate Eg value, there was
problem in the selection of exact tangent point. To overcome this
problem, Newton-Raphson method and mean-value theorem were used.
It was found th...
Questions
Question (1)
Photonic radar is in its rudimentary stages of development. They use laser pulses for detection instead of conventional EM waves. This helps in better tracking of objects especially with the speed calculation of moving objects. The problems associated with these type of radar systems are range that could be covered (is lesser than conventional radar) and phase noise. But usage of laser pulses results in ultra high bandwidth (hence huge amount of information) and reduction in the size of the antennas. Now radio optical phases arrays are such small antennas placed periodically on a lattice. The magnitude and phase of the current fed to these antennas are varied to scan the beam in different directions. These antennas are basically photonic emitters that emit lasers instead of EM waves.
