Business Graphene devices switch in femtoseconds

Business Graphene devices switch in femtoseconds

2013/07/15

Researchers from the Centre for Graphene Science at the Universities of Bath and Exeter have demonstrated incredibly short optical response rates using graphene, which could revolutionise telecommunications. 

Ordinarily optical switches respond at rate of a few picoseconds – around a trillionth of a second. The researchers have observed the response rate of an optical switch using ‘few layer graphene’ to be around one hundred femtoseconds – nearly a hundred times quicker than current materials.

“We’ve seen an ultrafast optical response rate, using ‘few-layer graphene’, which has exciting applications for the development of high speed optoelectronic components based on graphene,” says researcher Dr Enrico Da Como, “this fast response is in the infrared part of the electromagnetic spectrum where many applications in telecommunications, security and also medicine are currently developing.”

In the long term this research could also lead to the development of quantum cascade lasers based on graphene. Quantum cascade lasers are semiconductor lasers used in pollution monitoring, security and spectroscopy. Few-layer graphene could emerge as a unique platform for this application.

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