الفهرس 
SummaryOnly 14 pages are availabe for public view
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Abstract
Optical lens (Ol) is considered as one of the most important components in the optics and widely used in many applications such as imaging, encryption, memory storage, biomedical applications, and many other applications. Ols are usually made either from glass, plastic or as reported recently from plasmonics. Plasmonic lens has been considered as another choice instead of the normal dielectric lenses since they enable focusing beyond the diffraction limit. Most plasmonic lens designs rely on the formation of nano-slits arrays in thin metallic film made of noble metals such as gold and silver. There are many numerical techniques used to investigate the characteristics of plasmonic lens structures such as finite element method (FEM) based on COMSOL multiphysics software package.
In this thesis, we propose and simulate an active 2D plasmonic lens that has been carefully designed to achieve intensity beam modulation. The design consists of silicon oxide (SiO2), nematic liquid crystal (NLC) layer and array of non-uniform nano-scale golden (Au) rods, finely the optimization geometry paved the way to achieve good modulation intensity in terms of extinction ratio of about 3.5 dB.
Additionally, the proposed lens has been examined using different noble metals such as silver (Ag) and Aluminum (Al). In comparison with other reported lenses, the proposed lenses based Ag, Al and Au have relatively smaller dimensions, maximum intensity amplification factors of about 10.4, 16.6 and 12.5; respectively. The proposed lens may render itself as an efficient unit in the ultra-high nano scale integrated optical systems.