Overlapping effect in dense all-optical, point-by-point recording of holographic patterns in the ferrimagnetic alloy.

• Overlapping effect toggling the magnetic domain states is observed in all-optical point-by-point writing of patterns. • The influence of the overlapping amount on the quality of holographic reconstructions is examined. • The optimal amount of overlapping is derived providing the globally best holographic projections, in high agreement with the numerical model. Ferrimagnetic alloys are promising media for the ultrafast, non-volatile recording of diffractive patterns for further development of computer-generated holography toward practical display applications. In this work we measure and analyze the influence of the overlapping effect during dense point-by-point recording of holographic patterns on the quality of their far field reconstructions. In particular, we numerically and experimentally derive the optimal degree of overlapping of the holographic points being written in GdFeCo alloys for the optimal fidelity of reconstructed 2-D images, which features unitary fill factor of the writing process. [ABSTRACT FROM AUTHOR]