Table of content

Iraqi Journal of Applied Physics Letters

الرسائل العراقية في الفيزياء التطبيقية

ISSN: 1999656X
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

Iraqi Journal of Applied Physics (IJAPLett) is a scientific periodical sponsored and
published by the Iraqi Society for Alternative and Renewable Energy Sources and
Techniques (I.S.A.R.E.S.T.). The Editorial Board is responsible for the scientific content
and other editorial matters relating to the Journal. Manuscripts submitted are first screened
by the editors; those on subject matters within the scope of the IJAPLett are sent to an
expert referee for evaluation and may be sent to a second reviewer if necessary. This
screening process helps to assure an appropriate focus as well as high scientific quality of
the Journal. The IJAPLett welcomes submission of papers and letters in applied physics
and related fields of science, engineering and technology. They should have something in
common with what we now publish on inanimate materials and processes therein:
structures, transport, physical, electrical, dielectric, magnetic, and optical properties. Our
basic criterion stated below will continue to apply: papers must contain science, especially
physics, and there must be an application. We advise authors submitting papers to suggest
the names of at least two possible reviewers, with full information on addresses, phone and
e-mail. Suggestions of reviewers are welcome regardless of the subject.

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Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
editor_ijap@yahoo.co.uk

Table of content: 2010 volume:3 issue:1

Article
Linear Adaptive Antenna Array Geometry Effects on Radiation Pattern

Authors: A.H. Sallomi --- H.M. Mikhlif --- S.R. Salim
Pages: 3-6
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Abstract

Over the last few years, the number of subscribers to wireless services has increased at an explosive rate. Smart-antenna technology compared to conventional antenna has the ability to increase the number of simultaneous users, and satisfy the requirements of spectral efficiency, and coverage in wireless communication systems. In this paper the radiation pattern and performance of linear smart antenna array is investigated by considering multiple directions of arrivals of signals. The simulations done confirmed that smart antenna systems using Least Mean Square (LMS) algorithm are able to adjust their pattern to enhance desired signals, and reduce interference. The results also show that smart antenna radiation patterns are related to the number of elements in the array, the inter-element spacing, and amplitude distribution.


Article
Synchronization Scheme for Secured Communications System Based on Chaotic Signals

Authors: P.E. Steran
Pages: 7-10
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Abstract

In this work, a numerical investigation of a synchronization scheme for secure communication implemented with nonlinear optical ring cavities is performed. We have demonstrated that masking the information in a chaotic optical wave from a nonlinear ring cavity is technically feasible in a secured communication system. The synchronization is robust and analog information transmission is suitable for the specific case considered.


Article
Quantum Limit Characterization of Signal-to-Noise Ratio using Phase- Shift Keying in Homodyne Detection

Authors: N.J. Shukur
Pages: 11-14
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Abstract

In this work, a mathematical treatment for the quantum limit of signal-to-noise ratio (SNR) in homodyne coherent detection was presented. This treatment is based on the case of balanced detection when the incident signal power is much lesser than the local oscillator power when the efficient AC coupling is assumed. The final results were obtained from an analytical expression of SNR dependent of the average number of incident photons and the quantum efficiency.


Article
Polynanocrystalline CuIn3Se5 Thin Film Photoabsorber Layer Produced by Pulsed-Laser Deposition

Authors: A. Twerianovich --- S. Berzeneev --- E. Barissov
Pages: 15-18
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Abstract

Polycrystalline bulk CuIn3Se5 samples for pulsed laser deposition (PLD) targets were synthesized in evacuated quartz ampoules by vacuum melting of 99.999% pure elements. All the polynanocrystalline CuIn3Se5 thin films were deposited onto the glass and glass/ITO substrates by using the PLD technique. The synthesized bulk samples and deposited films were tested by using the XRD analysis. The time–temperature regime of PLD process was developed for preparation of polynanocrystalline CuIn3Se5 thin films with the same composition as the source target. We have used advanced 3-stages temperature-time regime. The thickness of prepared CuIn3Se5 layers was in the range from 300nm till 450nm. The influence of the thermal annealing on the photovoltaic properties and morphology of the as-deposited CuIn3Se5 layers was investigated. The technique of preparation of high photosensitive polynanocrystalline thin CuIn3Se5 films of n-type conductivity was elaborated.


Article
Characterization of E-Mode InZnO Thin Film Transistors Produced by DC Sputtering Technique

Authors: G.M.A. Yussif --- A.M.H. Enagar --- A.S. Megazi
Pages: 19-22
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Abstract

In this work, InZnO and InGaZnO were used as channel layers to fabricate enhancement mode thin film transistors on glass and flexible transparent substrate. The SiO2-In2O3-ZnO system and N2 plasma incorporated IZO film were grown to get a better controllability of the carrier concentration during the film growth. Hydrogen plasma and oxygen plasma effects on the TCO films and the TFTs were investigated.


Article
Profiling of Antimony Diffusivity in Silicon Substrates using Laser- Induced Diffusion Technique

Authors: O.A. Hamadi
Pages: 23-26
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Abstract

In this work, profiles of laser-induced diffusion of antimony in silicon were presented. These profiles were considered to attempt enhancing of the silicon-based devices. This enhancement is attributed to the increasing achieved in the diffusion length within a certain layer of the active region in the device. Laser-induced diffusion is a perfect technique for improving the characteristics of electronic devices since it is flexible, contactless, clean and well controlled.

Table of content: volume:3 issue:1