Figures & data
Figure 1. (a) Helical wave front (adopted from Padgett and Allen Citation4), (b) intensity profile, (c) phase profile and (d) characteristic interference pattern with a reference beam of an OV of topological charge 1.
Figure 2. Schematic of the experimental set-up used to study the vortex propagation through PhC, in which M is the mirror, BS is the beam splitter, BD is the beam dump, A is the aperture and L1 and L2 are the lens.
Figure 3. SEM image of PS PhC with sphere diameters: (a) 990 nm and (b) 1900 nm.
Figure 4. Diffraction pattern of: (a) Gaussian beam from PS 990 nm PhC, (b) OV from PS 990 nm PhC, (c) Gaussian beam from 1900 nm PhC and (d) OV from 1900 nm PhC.
Figure 5. Intensity profile of the diffracted spot of the Gaussian beam (solid line) and the vortex beam (dotted line) in: (a) PS 990 nm PhC and (b) PS 1900 nm PhC.
