Graphene-ferroelectric metadevices for nonvolatile memory and reconfigurable logic-gate operations.

ABSTRACT: Memory metamaterials are artificial media that sustain transformed electromagnetic properties without persistent external stimuli. Previous memory metamaterials were realized with phase-change materials, such as vanadium dioxide or chalcogenide glasses, which exhibit memory behaviour with respect to electrically/optically induced thermal stimuli. However, they require a thermally isolated environment for longer retention or strong optical pump for phase-change. Here we demonstrate electrically programmable nonvolatile memory metadevices realised by the hybridization of graphene, a ferroelectric and meta-atoms/meta-molecules, and extend the concept further to establish reconfigurable logic-gate metadevices. For a memory metadevice having a single electrical input, amplitude, phase and even

SUBMITTER: Kim WY 

PROVIDER: S-EPMC4737808 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature