Slow light in a 2D semiconductor plasmonic structure.

ABSTRACT: Spectrally narrow optical resonances can be used to generate slow light, i.e., a large reduction in the group velocity. In a previous work, we developed hybrid 2D semiconductor plasmonic structures, which consist of propagating optical frequency surface-plasmon polaritons interacting with excitons in a semiconductor monolayer. Here, we use coupled exciton-surface plasmon polaritons (E-SPPs) in monolayer WSe₂ to demonstrate slow light with a 1300 fold decrease of the SPP group velocity. Specifically, we use a high resolution two-color laser technique where the nonlinear E-SPP response gives rise to ultra-narrow coherent population oscillation (CPO) resonances, resulting in a group velocity on order of 10⁵ m/s. Our work paves the way toward on-chip actively switched del

SUBMITTER: Klein M 

PROVIDER: S-EPMC9585030 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature