Spin and position multiplexing holography based on Pancharatnam-Berry liquid crystal element

Optical elements are increasingly advancing toward miniaturization and integration, with liquid crystal (LC) materials emerging as high-performance candidates in the field of optoelectronics. However, most existing LC elements remain limited in functionality. Here, we propose a polarization and spatial multiplexing scheme that enables up to six-channel information multiplexing using a single LC element. Specifically, we develop a holographic phase optimization algorithm that combines spin and position multiplexing by leveraging Pancharatnam-Berry geometric phase encoding and accounting for the spatial propagation characteristics of light. By introducing a signal window and dynamic amplitude weighting constraints to crosstalk suppression, the approach significantly enhances information capacity while preserving high-fidelity image reconstruction. Experimental results demonstrate that the LC element can reconstruct distinct holographic images at different observation planes under illumination with left- and right-circularly polarized light. This approach offers a paradigm for multifunctional LC element design, substantially increasing the number of information channels without adding complexity to the system.