Fig. 8: Transmittance and diffraction patterns of sinusoidal amplitude spiral-like structures (SLSs) with m = 30.
a and d show the transmittance maps of two SLSs designed with sinusoidal amplitude profiles and curvature parameters L = 5, 10 mm−1. d includes a magnified view to resolve fine structural details. b, c present the corresponding simulated and experimental diffraction patterns under plane wave illumination for the structure in (a), while e, f display the patterns for the structure in (d). A main intensity spot (MIS), marked by a white circle, is tracked in each case to illustrate the rotation dynamics. Further visualization of these effects is available in Supplementary Movie 8.
