Fig. 3From: Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing3D schematic diagram of grating-coupled BSW resonance sensor under azimuthal illuminations (φ) in (x-y-z) reference system including incident angle (θinc), zeroth-order reflection (R0), and 2D grating parameters (Λ, r, h). Sensing region is located at the bottom of the grating-coupled BSW sensorBack to article page