الفهرس 
Chapter-1 IntroductionOnly 14 pages are availabe for public view
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Abstract
This thesis introduces an active modulation (switching) based on Electro-optic technique which is realizable utilizing both silicon-on-insulator (SOI) and metal-oxide semiconductor (MOS) waveguides. The active medium responsible for the modulation function is a thin layer of indium tin oxide (ITO) material merged into the layers of the MOS waveguide. The modulation mechanism is achieved by changing the permittivity of the active material via biasing the MOS waveguide with an electrical potential (External Control) which leads to shifting the propagated mode’ effective index; this makes the modal overlap amidst the contiguous waveguides change. This thesis will begin with modeling a hybrid plasmonic 2x2 routing electro-optic switch which is utilizing as a base unit in realizing all the proposed devices in this thesis. This structure supports the two types of polarized modes; transverse magnetic (TM) and transverse electric (TE). Due to the fact of altering the indices of TE polarized modes only with the applied potential, therefore, this structure is only restricted to the TM polarized modes because of their potent interaction with the plasmonic region. This thesis proposes modeling of more close-packed and efficacious active plasmonic 2x2 electro-optic routing switch that achieves brilliant results at the telecommunication wavelength in terms of transmission efficiency values, the extinction ratio (ER) values, and finally the insertion loss (IR) values. This structure will be reused as a hybrid plasmonic bidirectional coupler to keep up with the new challenge in designing a multi-functional Nano-optical plasmonic device for communication systems. The coupling ratio values that obtained in the two cases of the bidirectional coupler (Through and Coupled) and also the obtained insertion ratio values are considered satisfactory to some extent after comparing them with previous thesis Modeling of three different high order electro-optic plasmonic switching matrix have been proposed in this thesis. These structures utilized the plasmonic 2x2 electro-optic routing switch as a base building unit, and all of them achieved good results in terms of transmission efficiency values as well as the total foot print of the device. Because of the importance of filters which is considered a necessary component for optical communication systems. Modeling of three different types of hybrid plasmonic filters (Low Pass Filter, Band Reject Filter, and Band Pass Filter) have been announced in this thesis. The design of these filters relied on reusing the structure of the 3x3 switching matrix and the type of filter is determined according to the state of the control units used. The analyzed results verify the filtering’ function with suitable transmission percentage over the selected wavelength range (1300-1800) nm. Complementing the idea of a multi-functional Nano-optical plasmonic device for communication systems the proposed NxN switching matrix, N= 3 and 4, will be reused in realizing two different algorithms for wavelength division multiplexing technology. Given the importance of logic gates in the field of optical communications, it was necessary that this thesis contribute to the modeling of different examples of logic gates. Two different gates will be presented, namely OR and NAND logic gates, using the same design but with a different operating method. Also, the same schematic of the proposed hybrid plasmonic bidirectional coupler with the same design’ parameters in terms of dimensions and materials has been reused as a NOT logic gate. This also considered an application for the multi-use device technology that was previously mentioned. the proposed logic gates operate on a wide wavelength range as well as satisfy a good transmission efficiency. The proposed devices are numerically modeled, simulated and characterized using Lumerical 3D-FDTD Solutions, and All the gained data are used to make a validation with earlier researches as it is possible. The components would be useful in the optical interconnect, photonic integrated circuits and signal processing system.