# Holographic Data Storage **Domain:** Archival Storage / Photonics **Doc Type:** Technology Concept Node **Maturity:** Long-Running Research and Specialized Products **Related:** [[Physical Permanence Gradient]], [[Project Silica]], [[Multiscale Image Pyramid]] --- ## Definition **Holographic data storage** records information throughout a three-dimensional photosensitive medium using interference patterns formed by controlled light beams. Multiple pages or patterns can share a volume through angle, wavelength, phase, or other multiplexing strategies. ## Continuity role It represents a high-density optical vector with a different access and longevity profile from glass voxels, ceramic surface ablation, DNA, magnetic tape, or conventional optical media.