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Helmholtz-Zentrum Dresden-Rossendorf (HZDR)

National research center

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Scientists build first all-optical photonic time crystal

New Capabilities

Provided the terahertz source and co-authored the study

For decades, engineers shaped light by building patterns into space: layered mirrors, etched crystals, fiber cores. A team from France and Germany just did it in time instead. They flipped a material's optical properties on and off billions of times faster than any electronic switch.

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