Multiple-Mode Bowtie Cavities for Refractive Index and Glucose Sensors Working in Visible and Near-infrared Wavelength Ranges

A multiple-mode metal-insulator-metal plasmonic sensor with four coupled bowtie resonators containing two pairs of silver baffles is numerically investigated using the finite element method and verified by temporal mode theory. The proposed structure can function as a refractive index glucose sensors working in visible near-infrared wavelength ranges. Simulation results show that introducing cavities modify plasmon resonance modes give tunable way to enhance sensitivity figure merit. highest (S) reach S = 1500.00, 1400.00, 1100.00 nm/RIU high merit (FOM) 50.00, 46.67, 36.67 RIU−1 from 1 3. obtained three operating wavelengths simultaneously exceeds along remarkably FOM, which are not attainable other reported literature. realize multi-mode shows impressive practical prospects be applied for integrated optics circuits (IOCs) nanophotonics devices.