💡 World's First Photonic Time Crystal Reshapes Light in Trillionths of a Second
Scientists from École Polytechnique, Collège de France, and HZDR built the first all-optical photonic time crystal — a gold metamaterial that flips its reflectivity and resonance on picosecond timescales, comparable to the oscillation cycle of light itself. Published in Nature, the device cut photon energy losses in half and opens a path toward ultrafast terahertz lasers for medical imaging and next-gen optical computing. What blows your mind most: that we can control light this fast, or that we're only now managing it for the first time?
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