Fig. 5From: 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 t 3. b Reflectivity of the resonance dip and its FWHM as functions of t 3. c FOM and FOM* as functions of t 3. Other parameters: p = 1200 nm, w = 622 nm, l = 420 nm, t 1 = 328 nm, and t 2 = 28 nmBack to article page