Circular-Shaped Nanostrip Fed Plasmonic Nano-Antenna Sensor

To meet the high data rate requirements nanophotonic devices such as plasmonic nano-antennas are essential in future. In this regard, the manuscript portrays the design and investigation of a plasmonic nanopatch antenna sensor using silver, gold and graphene on different dielectric substrates. The Drude and Lorentz dispersion models are used to study the plasmonic characteristics of the nano-antenna sensor materials. Furthermore, analysis of the dispersion model demonstrates that plasmonic metals exhibit negative real permittivity that is essential for the plasmon resonance. The analysis of the proposed gold, silver and graphene nanopatch antennas is performed through the Finite Integration Technique on CST Microwave Studio. The study demonstrates that the proposed circular-shaped nanostrip fed nano-antenna sensor exhibits a large enhancement in the field, therefore it can be used for plasmonic sensing applications.