Fig. 3
SAW delay line and fabricated PnC. a Schematic of device used to characterize the PnC with excitation and detection inter-digital transducers and propagation direction. The blue shaded area represents the fabricated PnC which covers the transducer aperture. b Section of a 3 mm × 80 µm square array of annular holes with depth 6.4 µm, inner radius 3.1 µm, outer radius of 5.1 µm and pitch 10.9 µm. c Cross section depth profile of an individual annular hole with platinum within the hole to provide image contrast
