Absorbing electromagnetic energy while avoiding the heat

Each cylinder of this new non-metal metamaterial is made of boron-doped silicon and precisely tailored to absorb electromagnetic waves. Credit: Willie Padilla, Duke University

Electrical engineers at Duke University have created the world’s first electromagnetic metamaterial made without any metal. The device’s ability to absorb electromagnetic energy without heating up has direct applications in imaging, sensing and lighting.


Metamaterials are synthetic materials composed of many individual, engineered features that together produce properties not found in nature. Imagine an moving through a made of thousands of tiny electrical cells. If researchers can tune each cell…

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