Crumple nanostructured graphene for mechanically reconfigurable plasmonic resonances

Graphene has been widely used for optical and optoelectronic applications due to the capability of achieving electrostatically tunable plasmonic resonances. However, patterning of graphene in complex geometries and a narrow tunable range of plasmonic resonances have been a challenge for practical use of graphene in the applications. Here, we present a novel approach to achieve mechanically reconfigurable, strong plasmonic resonances based on crumple-nanostructured graphene. We show that the mechanical reconfiguration of crumple nanostructured graphene enables broad spectral tunability of plasmonic resonances from mid-to near-infrared, introducing a new tuning method combined with conventional electrostatic tuning. Our results demonstrate that crumple nanostructured graphene provides an innovative platform to graphene-based plasmonics for strong, broadband tunable plasmonic resonances.