الفهرس 
Chapter (1) IntroductionOnly 14 pages are availabe for public view
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Abstract
This thesis focuses on optical memory built on photonic crystals (PhC), which are expand-ing quickly to meet the demand for increased bandwidth in recent technology applications. Even more, bandwidth is required by advancing technologies, which must be achieved at an incredibly small, and high speed. Optical memories are one of those devices that pro-cess light waves to enhance storage, speed, processing, and power for a more efficient sied. The use of electrical memories usually makes things bigger, low efficiency, requires much power consumption, requires converters for using fiber optics, and has limited speed. In this thesis, we highlight optical memory as one of the fundamental components of systems that use light. High processing speed, large bandwidth, and little transmission loss are all offered by optical memory. Many simultaneous channels of communication without inter-faces will occur at a light speed in a photonic circuit that is extremely comparable to the vacuum light speed. PhC also provides greater storage density and accessibility without energy loss from overheating. The proposed SR-FF memory has two optical NOR logic gates based on two-dimensional (2D) PhC with a square lattice of silicon (Si) dielectric rods in air. The propagation through the PhC SR- Flip Flop (SR-FF) structure is studied by using COMSOL Multiphysics software package based on finite element method (FEM). A switching time of only a few picoseconds is achieved with low input power and low power loss. The reported optical memory SR-FF has also a small dimension of 38×22 μm2 which makes it a practical design for photonic integrated circuits (PICs).