From a flat mirror, designer light


Exploiting a novel technique called phase discontinuity, researchers at the Harvard School of Engineering and Applied Sciences (SEAS) have induced light rays to behave in a way that defies the centuries-old laws of reflection and…

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‘Watermark ink’ device identifies unknown liquids instantly


Materials scientists and applied physicists collaborating at Harvard’s School of Engineering and Applied Sciences (SEAS) have invented a new device that can instantly identify an unknown liquid. The device, which fits in the palm of…

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