Optical Waveguides with Compound Multiperiodic Grating Nanostructures for Refractive Index Sensing

Figure 3

(a) Simulated and (b) measured reflectance spectra of the monoperiodic nanostructure M ( nm, ). Fano-like peaks are observed for the simulation, while the measured spectra exhibit Lorentzian peaks due to the measurement with crossed polarization filters for background suppression.

(a) M:  nm;   (sim.)

(b) M:  nm;    (meas.)