Columbia researchers have announced their claim of first using static charge between 2D atomic layers for providing a replacement route for generating graphene plasmon polaritons without an external power source or chemical dopants, according to Graphene Info
They have achieved plasmonically active graphene while maintaining record-high charge density without an external gate. “This work allows us to use graphene as a plasmonic material without metal gates or voltage sources, making it possible to create stand-alone graphene plasmonic structures for the first time,” said co-PI James Hone, Wang Fong-Jen Professor of Mechanical Engineering at Columbia Engineering.
“One of our major achievements in this work is attaining charge densities in graphene roughly 10 times larger than the limits imposed by dielectric breakdown in a standard gated device,” said the study’s lead PI Dmitri Basov, professor of physics.
This revelation shows great promise for possibly creating new types of electronic and optical devices reliant on graphene.