Tunable bound states in the continuum in active metasurfaces of graphene disk dimers.

ABSTRACT: Bound states in the continuum (BICs) in metasurfaces have lately attracted a great deal of attention stemming from their inherent (formally) divergent Q factors, which lead to an enhancement of light-matter interaction in two-dimensional geometries. However, the development of plausible means to actively manipulate them remains a major challenge. The use of graphene layers has recently been suggested, employed either as a substrate or a coating that modifies the dielectric environment of the metasurface. Here, instead, we propose to exploit graphene disk dimers supporting in-plane plasmons directly as active meta-atoms in a square array. We prove analytically that both the emergence of a BIC and its Q factor can be tuned in an active manner by applying a different external po

SUBMITTER: Pura JL 

PROVIDER: S-EPMC11502110 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature