Fig. 2From: Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive BiosensingCalculated electric field distribution for s-polarized light at resonance where the surface wave is excited on the top surface only. White dotted line represents 2D grating, buffer layer, and DBR layers. Field intensity of BSW mode (yellow region) is concentrated in air holesBack to article page