Figure 7
Helical characterization and mechanism analysis of 3D chiral microstructures. (a) Simulated intensity distribution images of the Ex component in 3 μm steps along the z-axis under the OBJ. (b) The intensity and phase profiles are simulated on the plane, z=7 μm from the focal plane of OBJ. (c) The helical angle (Ha) of the chiral microstructure is defined as the rotating angle of cross-sections along the z-axis. (d) Azimuthal angle versus phase value in the phase profile of optical vortices with l=3, 4 and 6, respectively. (e) The helical angles (Has) are measured as a function of height (H), shown as points, and are compared to the values in Equation (7), shown as solid lines. The error bars are the s.d. of three fabrications using the same parameters.
