Fig. 1. (a) Scheme showing the creation of a DH-PSF by using a phase mask with the phase profile shown in (b). (c) Intensity distribution in the image plane of the lens for different distances between the point light source and the phase mask.
Fig. 2. Phase profiles for realizing a DH-PSF with (a) 4 and (b) 10 evenly spaced phase steps. (c) Intensity profile of ideal DH-PSF, where the main parameters are indicated. (d)–(g) Comparison of parameters of ideal and discretized PSFs dependent on the distance
Fig. 3. (a) Sketch of the considered geometry of the metasurface consisting of silicon nanodisks embedded in a medium with a refractive index of
Fig. 4. (a) SEM image of realized silicon metasurface before covering with spin-on-glass. The scale bar is
Fig. 5. (a) Measured DH-PSF. (b) Rotation angle of the DH-PSF in dependence on the source-sample distance
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