Exploiting Oriented Field Projectors to Open Topological Gaps in Plasmonic Nanoparticle Arrays.

ABSTRACT: In the last years there have been multiple proposals in nanophotonics to mimic topological condensed matter systems. However, nanoparticles have degrees of freedom that atoms lack of, like dimensions or shape, which can be exploited to explore topology beyond electronics. Elongated nanoparticles can act like projectors of the electric field in the direction of the major axis. Then, by orienting them in an array the coupling between them can be tuned, allowing to open a gap in an otherwise gapless system. As a proof of the potential of the use of orientation of nanoparticles for topology, we study 1D chains of prolate spheroidal silver nanoparticles. We show that in these arrays spatial modulation of the polarization allows to open gaps, engineer hidden crystalline symmetries and to switch

SUBMITTER: Buendia A 

PROVIDER: S-EPMC10664046 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature