Over the past decades, ‘storing light’ has appeared as a rather controversial concept, given that a photon’s inherent nature hinders its spatial confinement. The first research efforts in demonstrating optical memory functionality started as a fascinating experimental exercise, and two decades later the remarkable achievements of integrated optical memories and optical random access memories (RAMs) introduced a new roadmap for light-based information storage that can offer fast access times, high bandwidth and seamless cooperation with optical interconnect lines.
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Source: Phys.org