Fig. 7From: Infrared Plasmonic Refractive Index Sensor with Ultra-High Figure of Merit Based on the Optimized All-Metal Grating a Reflection spectra as a function of l. b Reflectivity of the resonance dip and its FWHM as functions of l. c FOM and FOM* as functions of l. Other parameters: p = 1200 nm, w = 622 nm, l = 420 nm, t 1 = 328 nm, t 2 = 28 nm, and t 3 = 18 nmBack to article page