Holographic complex-amplitude storage based on hybrid angle-polarization multiplexing

We present a hybrid multiplexing method for holographic optical storage that combines complex-amplitude encoding with polarization- and angle-based multiplexing to enhance storage density and capacity significantly beyond conventional approaches. By leveraging polarization holography, complex-amplitude data can be selectively recorded into orthogonal polarization channels. Furthermore, angular multiplexing is also applied to co-record multiple holograms at the same spatial location. During the reading process, each hologram can be selectively reconstructed under its specific Bragg and polarization conditions. Remarkably, despite exploiting these degrees, the reconstruction fidelity remains exceptionally high, with negligible degradation or crosstalk. This demonstrates a scalable route to high‑capacity, high‑fidelity holographic memories for next‑generation data‑intensive applications.