Quantum surface-response of metals revealed by acoustic graphene plasmons.

ABSTRACT: A quantitative understanding of the electromagnetic response of materials is essential for the precise engineering of maximal, versatile, and controllable light-matter interactions. Material surfaces, in particular, are prominent platforms for enhancing electromagnetic interactions and for tailoring chemical processes. However, at the deep nanoscale, the electromagnetic response of electron systems is significantly impacted by quantum surface-response at material interfaces, which is challenging to probe using standard optical techniques. Here, we show how ultraconfined acoustic graphene plasmons in graphene-dielectric-metal structures can be used to probe the quantum surface-response functions of nearby metals, here encoded through the so-called Feibelman d-parameters. Based on our theore

SUBMITTER: Goncalves PAD 

PROVIDER: S-EPMC8169912 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature