A whole new light on graphene metamaterials: Tunable graphene device is first tool in a kit for putting terahertz light to work

Invisible terahertz light can detect explosives, image drug structures, and pinpoint skin cancer, but practical tools for using it are scarce. Scientists have now made a graphene microribbon array that strongly responds to terahertz light by exciting the collective electron oscillations known as plasmons. The device can be tuned with exquisite precision by varying the width of the graphene ribbons and controlling electron density.

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