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Limits RegistryResearchers at the University of Southampton's Optoelectronics Research Centre developed a technique for encoding data as nanostructures within fused quartz glass using femtosecond laser pulses, with the team calculating a theoretical thermal stability of up to 13.8 billion years at room temperature — comparable to the age of the universe — leading to media coverage nicknaming it the 'Superman memory crystal.' As of 2026 it remains a laboratory demonstration rather than a commercially available storage product, and the multi-billion-year figure is a theoretical extrapolation from thermal decay modeling rather than an observed result.
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Researchers at the University of Southampton's Optoelectronics Research Centre developed a technique for encoding data as nanostructures within fused quartz glass using femtosecond laser pulses, with the team calculating a theoretical thermal stability of up to 13.8 billion years at room temperature — comparable to the age of the universe — leading to media coverage nicknaming it the 'Superman memory crystal.' As of 2026 it remains a laboratory demonstration rather than a commercially available storage product, and the multi-billion-year figure is a theoretical extrapolation from thermal decay modeling rather than an observed result.
The theoretical room-temperature thermal-stability lifespan calculated by University of Southampton researchers for data encoded in nanostructured fused-quartz glass using femtosecond laser writing, sometimes called '5D' optical storage.
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Limits Registry. LR-5D-MEMORY-CRYSTAL-LONGEVITY. Longest theoretical data longevity of a laboratory optical storage medium. 2026.