Fig. 6: Sample input–output images for the ground truth transformation presented in Fig. 4b and the optical outputs by the diffractive designs with N = 482 and N = 802.
From: All-optical synthesis of an arbitrary linear transformation using diffractive surfaces
The magnitude and phase of the normalized output fields and the differences of these quantities with respect to the ground truth are shown. \(\left| {\angle {{{\boldsymbol{o}}}} - \angle \widehat {{{\boldsymbol{o}}}}^\prime } \right|_\pi\) indicates wrapped phase difference between the groundtruth and the normalized output field
