Vertical Coupled Metal- Insulator - Metal(mim)optical Waveguide for Sub Wavelength Light Confinement Using Surface Plasmon Resonance

Surface plasmon resonance (SPR) biosensor is one of the optical sensor that exploits the specific properties of electromagnetic waves. SPR biosensors have been generally utilized in the field of environmental sciences for a real-time monitoring. It is a label-free technique that is utilized to recognize biological analytes and analyze the binding interactions between a liquid sample with a biomolecular recognition element immobilized on the SPR sensor surface. we propose a vertical tiny finite thickness metal-insulator-metal(MIM) surface plasmon resonance based optical sensor that is placed on a silicon waveguide .The proposed waveguide structure act as a Fabry-perot resonator . The proposed biosensor is modeled and simulated by using RSoft CAD tool and the channel property of the device is investigated by Finite difference time domain (FDTD) solver in RSoft tool.