Figure 1. MUBs for hybrid photonic qusix encoding: Representation of quantum states with dimension d = 6 obtained from the direct product of a three-dimensional subspace of OAM and the two-dimensional space π of polarization.

The three main boxes correspond to the three MUBs. On the left side, the intensity and phase distributions of each OAM spatial mode and the corresponding generating kinoform are shown. On the right side the polarization states are illustrated graphically by showing the optical electric field orientation in space at a given time.