The optical characteristics of the defected plasmonic waveguide under pressure

Abstract A two-dimensional plasmonic structure based on the Metal-Insulator-Metal (MIM) waveguide configuration containing a defect is proposed and numerically simulated by Finite-Element-Method (FEM). The proposed structure is introduced as a basic block of a plasmonic pressure sensor. It is shown that the transmission spectrum of the geometry is highly dependent on the amount of pressure being applied and geometrical shape of the defect. According to our results, the pressure increment is associated with the blue shift of the resonance wavelength. More over, the sensitivity and the Figure of Merit (FOM) can be adjusted by geometrical shape of the defect. The high sensitivity value of 1493 GPa −1 is achieved in our simulation which confirms the capability of the proposed structure as the pressure sensor.