Plasmonic Waveguide And Filter Design

The miniaturization of photonics into subwavelength dimensions is of great current interest. Researchers have proposed many different technologies to shrink the size of photonic circuit. Surface plasmons is one of the promising approaches. And some plasmonic waveguide, such as metal V-groove, slot line and metal nanostrips, have been proposed and analyzed.The motivation of this Master thesis work is to investigate the properties of the fundamental mode of the slot line when the size of the waveguide is drastically reduced. We have studied different properties of slot line, such as Q-factor, propagation length, and confinement, using the finite element analysis and solver software package, COMSOL.Another part of this thesis is feasibility study of filter (half-wave filter) design using plasmonic waveguide, microstrip line, based on microwave engineering. In this part we have tried to model the gap, which is a coupling component between resonators and also act as an inverter in a half-wave filter, usingΠ-capacitance-network model. TheΠ-capacitance-network model is a typical model for gap in microwave engineering. We started to use ideal metal to simplify the problem. Unfortunately, we didn' t succeed in modeling the gap using S-parameter and were faced with a contradiction. However, finally, we still proof that theΠ-capacitance-network model is correct. Due to time limitations we did not proceed with real metal.