Design and Manufacture of Refractive Index Sensors Based on a Resonator System with Two Plasmonic Waveguides and Two Connected Cavities

Abstract

Hamid Abbasi

In this paper, a plasmonic refractive index sensor based on metal insulated metal (MIM) waveguide with two resonator cavities is proposed and designed. Resonance wavelengths and refractive index of resonators have been investigated and simulated by the time domain finite difference method. Considering that the sensor largely depends on its materials and structure, as a result, by changing the dimensions of the cavity and changing the distance between the cavities, and changing the refractive index, we can weaken or strengthen the transmission coefficient in resonant modes. These plasmonic sensors with a simple framework and high optical resolution can be applied to on-chip sensor systems and optical integrated circuits. Optical sensors are widely used to measure the refractive index in the medical, chemical, and food industries, and due to the specific correct distribution of resonances, they are highly sensitive to changes in the refractive index of the environment. We also draw all the diagrams of this sensor using MATLAB software.

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