Multiple Fano Resonances in a Metal–Insulator–Metal Waveguide for Nano-Sensing of Multiple Biological Parameters and Tunable Slow Light

A surface plasmonic waveguide made of metal–insulator–metal (MIM) capable generating triple Fano resonances is proposed and numerically investigated for multi-biological parameter sensing as well tunable slow light. The up a bus with silver baffle, square split-ring cavity center (SSRCSC), circular ring (CRCSC). Based on the resonances, human blood temperature plasma concentration are measured simultaneously at different locations in waveguide, maximum sensitivities were 0.25 nm/°C 0.2 nm·L/g, respectively. Furthermore, two biological parameters can be used to achieve light, it was found that group delay responses all conformed cubic functions. MIM may have great applications future nano-sensing multiple information processing optical chips or bio-optical chips.