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This innovation enables large-scale controllable preparation and precise integration of multi-scale optical metamaterials, making production "as simple as printing newspapers," said Song Yanlin, a researcher at the institute.

"The achievement represents a deep convergence of materials science, micro-nano optics, and advanced manufacturing," Song said, "The roll-to-roll technology not only dismantles high-cost barriers and boosts mass-production efficiency, but also allows on-demand printing to tailor optical properties for each metamaterial pixel unit -- an unprecedented capability that opens up new pathways for customized micro-nano optics research."

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