الفهرس 
General IntroductionOnly 14 pages are availabe for public view
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Abstract
Metallic-dielectric photonic crystals have shown unique characteristics over the dielectric photonic crystals, such as wider band gap and saturated color [3, 5]. In addition, metallic-dielectric photonic crystals have a number of unique properties due to the presence of high conductivity and plasma frequency in the metal constituent. In addition, nanophotonic metal-dielectric multilayers have attracted much attention due to their unique structural and optical properties compared to continuous thin films or bulk materials.
The objective of this study is to fabricate and characterize two dimension photonic crystals composed of metal- dielectric multilayers grown onto aluminum substrates. Electrochemical synthesis of Alumina nanowires, Sn/Alumina nanowires, tin nanoparticles/PAA photonic crystal and Pt nanorods/PAA photonic crystal, are aimed. Porous anodized alumina (PAA) membranes, as adequate templates, are produced by the known two-step anodization method combined with the pore widening process at different length of times.
Since the properties and applications of the resulting nanostructures are sensitive to the growth conditions and significantly affect any based devices performance, understanding of the relationship between growth conditions and morphological evolution as well as optical properties is much more essential for all applications mentioned above. Therefore, the present work aims to optimize the preparative parameters used to obtain two – dimension photonic crystal composed of metal-dielectric multilayers using convenient, simple, rapid economical and reproducible approaches. Therefore, the plan of study comprises;
1- Fabrication of PAA membranes using two-step anodization method combined with the pore widening process.
2- Study of the preparative parameters that influence the structural, morphology and pore diameter of the fabricated PAA membranes.
3- Optimize the chemical etching process conditions for obtaining alumina nanowires at certain conditions.
4- Preparation and characterization of PAA membranes coated with tin nanoparticles.
5- Formation of Platinum nanodiscs onto the prepared PAA membranes using sputtering technique, and their characterization.
6- Evaluation of the optical response functions by spectral reflectance
measurements and their correlation with the structural parameters of the fabricated nano-structures.