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Simulation and Analysis Graphene Based Bio-chemical Sensor Using Localized Surface Plasmon Resonance
, M.Sc. Thesis Sharif University of Technology ; Faez, Rahim (Supervisor)
Abstract
One of the different sensing techniques for biosensors is based on surface plasmon resonance which provides high reliability and efficiency. In this project working operating principles of biosensors based on surface plasmon resonance will be examined. For investigation of sensing meachanism we assume that there an array consisting of alternating graphen ribbons which by applying light leads to an effective magnetic field coupling to the localized surface plasmon. The numerical calculations are based on the exact solution of Maxwell's equation using Fuorier Model Method and Matlab coding. In these calculations, the coefficients of transmission, reflection and absorption of light versus...
Design and Fabrication of a Thin and Wideband Electromagnetic Millimeter Wave Absorber
, M.Sc. Thesis Sharif University of Technology ; Rejaie Salmasi, Behzad (Supervisor) ; Khavasi, Amin (Supervisor)
Abstract
In this research, an electromagnetic wave absorber based on metamaterial structures is designed and built that is able to absorb a significant part of the wave power (up to 90%) in the millimeter wave band. The characteristics of this absorber are very low thickness (about a quarter of the wavelength compared to the central frequency) and high absorption bandwidth (up to 50% compared to the central frequency). Among the various structures studied, the structure of mesh arrays or conductive loops was selected for design. Using the Babinet principle, a transmission line model was proposed to analyze the behavior of this structure and became the basis for the design of the electromagnetic...