Graphene has been used to develop photodetectors for quite some time (quantum dots have been found to enhance the sensitivity just last month), and now researchers from the University of Maryland (UMD) discovered that using bilayer graphene can be used to make ultra fast, broad-range photodetectors.

The team made a prototype device, which unfortunately has a high electrical resistance and so needs a lot of light to be useful. They are working to lower this now.

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