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http://hdl.handle.net/20.500.12358/21468
TitleOptical Sensors Based on Photonic Crystal
Title in Arabicالمجسمات الضوئية المعتمدة على البلورة الضوئية
Abstract

In recent years, photonic crystals have achieved a lot of research significance due to their applications in many fields. Many photonic ccrystal sensors have been proposed based on their novel structure and unique physical properties such as reflectance/transmittance. In this thesis, two layers one dimensional photonic crystal slab waveguide was assumed in which the first layer was considered to be the analyte layer and the second layer was considered to be LHM, dielectric or metal for transverse electric (TE) and transverse magnetic (TM) waves. The dispersion relation of the proposed structure was derived and solved numerically and the sensitivity was also calculated. The condition required for the sensor to have its maximum sensitivity were presented. The dependence of the sensitivity on some different parameters of the structure was plotted and studied. It was found that the highest sensitivity was achieved by using the LHM materials in the photonic crystal rather than using metal and dielectric materials in photonic crystal. Our results show that it is possible for LHM photonic structure to achieve a sensitivity improvement of 412% for TE mode and 1056% for TM mode when compared to conventional slab waveguide sensor. Moreover, one dimensional ternary photonic crystals were investigated as refractometric sensors for sensing very small refractive index change of an analyte material. The principle of operation of photonic crystal as a refractometric sensors in reflection mode was explained. The transmission of an incident wave were studied in details using Fresnel reflection coefficients. The transmission coefficient was plotted with the angle of incidence and wavelength of incident light for air and water as analyte materials. It was observed that a slight refractive index change in analyte layer of the ternary structure causes a sufficiently large transmission peak shift.

Authors
Shaheen, Somaia Ali
Supervisors
Taya, Sofyan A
Typeرسالة ماجستير
Date2016
LanguageEnglish
Publisherالجامعة الإسلامية - غزة
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  • PhD and MSc Theses- Faculty of Science [445]
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The institutional repository of the Islamic University of Gaza was established as part of the ROMOR project that has been co-funded with support from the European Commission under the ERASMUS + European programme. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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The institutional repository of the Islamic University of Gaza was established as part of the ROMOR project that has been co-funded with support from the European Commission under the ERASMUS + European programme. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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