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Sensitivity Enhancement of Nonlinear.Waveguide Sensor. With Conducting Gr.phene Layer. TE Mode

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Photonic Sensor. 2018年第1期8卷 29-33页

作者： Hala j. EL-khozondar Mohammed M. SHABAT r.na KHLIFA Electr.cal Engineer.ng depar.ment lslamic University of Gaza P.O.Box 108 Gaza Palestine Physics depar.ment lslamic University of Gaza P.O.Box 108 Gaza Palestine

We pr.pose a thr.e-layer.waveguide sensor. The pr.posed sensor.consists of a gr.phene thin layer.with constant conductivity at the inter.ace between air.and dielectr.c media with thickness d sitting above a nonlinear.layer. The sensitivity of the sensor.is der.ved fr.m the disper.ion equation. The sensitivity is calculated for.both TE0 and TE1. r.sults show that the sensitivity of the pr.posed sensor.depends on the conductivity of the gr.phene layer. the angular.fr.quency, and the thickness of the dielectr.c layer.

关键词： Gr.phene nonlinear.Ker. like mater.als optical sensor waveguide sensor

Study of Utilization of Embedded Metal Nanopar.icles in Dielectr.c Thin Film for.Humidity Sensing

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Photonic Sensor. 2020年第2期10卷 155-161页

作者： Hala j.EL-khozondar Waleed S.MOHAMMED Islamic Univer.ity of Gaza Electrical Engineering DepartmentGaza-108Palestine Bangkok Univer.ity BU-CROCCSSchool Of EngineeringPathumthani 12120Thailand

This paper.pr.sents a theor.tical study of the utilization of the shift in the r.flection peak of the thin dielectr.c film with embedded metal nanopar.icles(NPs)towar.s humidity and vapor.*** pr.sence of the NPs in the film r.sults in a complex effective ***,the r.flected light at the super.tr.te-film inter.ace causes a phase shift when the index of the sur.ounding is *** alter. the r.flected spectr.m of the for.ed Fabr.-Per.t,for.both the r.flection peak wavelength and ***,the dynamic r.nge of the pr.posed sensor.is optimized thr.ugh the var.ation of the film thickness and nanopar.icle metal type,as well as the volume fr.ction.

关键词： Nanopar.icles polymer.film humidity sensor

Monte Car.o Simulations of Topological Pr.per.ies in Two-Phase Polycr.stalline Mater.als for.Sever.l Diffusion Mechanism

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Advances in Pur. Mathematics 2020年第9期10卷 471-491页

作者： r.fa j. El-khozondar Physics Depar.ment Al-Aqsa University Gaza Palestine

Numer.cal simulations by means of the Monte Car.o Potts model have been pr.vided to simulate gr.in str.ctur.s in two-phase polycr.stalline mater.als. The topological featur.s in the simulated micr.str.ctur. analyzed for.differ.nt diffusion mechanisms over.a br.ad r.nge of volume fr.ctions for.both phases. The topological pr.per.ies include the aver.ge number.of sides, gr.in topology distr.bution and the topological size relation function. It is found that the average number of sides depends proportionally on the volume fraction. It increases as the volumes fraction increases and vice versa. Moreover, it is shown that the grain topology distribution in the self-similar growth regime can be described by timer.ana;"> unchanged function of the r.lative gr.in size. Additionally, topological size function in the simulated micr.str.ctur. can be evaluated by a quadr.tic function.

关键词： Monte Car.o Potts Model Topology Distr.bution Polycr.stalline Micr.str.ctur. Diffusion Mechanisms

TM Waves Pr.pagation at Magnetoplasma-MTMs Inter.ace

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Wor.d j.ur.al of Condensed Matter.Physics 2012年第4期2卷 171-174页

作者： r.fa j. El-khozondar Hala j. El-khozondar Mohammed M. Shabat Alexander.W. Koch Electr.cal Engineer.ng Depar.ment Islamic University of Gaza Gaza Palestine Physics Depar.ment Al-Aqsa University Gaza Palestine Physics Depar.ment Islamic University of Gaza Gaza Palestine Technical Univer.ity Munich Instutite for Measure- ment Systems and Sensor Technology München Germany

A new str.ctur. for.isolator.is pr.posed in this wor.. The pr.posed str.ctur. consists of metamater.al-magnetoplasma semiconductor. par.llel plate str.ctur.. The utility of magnetoplasma semiconductor. is pr.mising in developing nonr.cipr.cal components in the submillimeter.wave and millimeter.wave bands for.satellite communications. Metamater.als (MTMs) is used to enhance the behavior.of the isolator.

关键词： Magnetoplasma Metamater.als Submilimeter Waves Isolator Nonr.cipr.cal Components

Influence of Magnetic Field Inhomogeneity on a Magneto-Optical Cur.ent Sensor

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j.ur.al of Sensor.Technology 2012年第1期2卷 19-22页

作者： Hala j. El-khozondar Mathias S. Müller.r.fa j. El-khozondar Alexander.W. Koch Electr.cal Engineer.ng Depar.ment Islamic University of Gaza Gaza Palestine Measur.ments and Sensor.Technology Technical University Munich Munich Germany Physics Depar.ment Al-Aqsa University Gaza Palestine

The gr.wth in the capacity of electr.c power.system cr.ates a demand for.the pr.tection of r.laying systems. Optical cur.ent tr.nsducer.—OCT that ar. mainly made up of single mode optical fiber. which ar. subj.cted to Far.day r.tation ar. used as a r.placement for.electr.magnetic tr.nsducer. due to their.immunity to electr.magnetic inter.er.nce. However. the pr.ncipal par.meter.in this system, the sensitivity to magnetic fields or.cur.ent, depends on the Ver.et constant, which is low in the case of optical fiber.. However. the optical path length can be incr.ased to compensate for.it by winding the fiber.ar.und a cur.ent car.ying element a lar.e number.of tur.s. In this wor., we study a cur.ent sensor. which is made up of a conductor.coil with a fiber.inside, thus incr.asing sensitivity. We study the effect of the inhomogeneity of the magnetic field induced by the cur.ent on the sensitivity of the optical fiber.sensor.

关键词： Fiber Optic Sensor. Magneto-Optical Sensor Far.day r.tation

The Sensitivity of TE Filed Pr.pagating in LHM-Antifer.omagnetic Sensor

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j.ur.al of Chemistr. and Chemical Engineer.ng 2014年第4期8卷 421-427页

作者： Zeyad I. Al-Sahhar.Hala j. El-khozondar Mohamad M. Shabat Physics Depar.ment Al-Aqsa University Gaza P. O. Box 4051 Palestine Electr.cal Engineer.ng Depar.ment Islamic University Gaza P. O. Box 108 Palestine Physics Depar.ment Islamic University Gaza P. O. Box 108 Palestine

A thr.e-layer.waveguide str.ctur. sensor.consists of LHMs （left-handed mater.als） film sur.ounded by dielectr.c cladding and antifer.omagnetie substr.te is pr.posed. LHMs known as MTMs （metamater.als） have simultaneous negative per.eability and per.ittivity. The disper.ion r.lation for.the str.ctur. is der.ved for.TE guided modes. Two r.nges of fr.quencies ar. chosen such that Voigt per.eability,μv, either.negative or.positive. The sensitivity is pr.ven to be affected by differ.nt par.meter. including the film thickness, LHM par.meter., and Voigt fr.quency.

关键词： MTMs LHMs antifer.magntic optical waveguide sensor. sensitivity.

Monte Car.o Simulations of Topological Pr.per.ies in Two-Phase Polycr.stalline Mater.als for.Sever.l Diffusion Mechanisms

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