Anderson Localized Plasmon in Graphene with Random Tensile-Strain Distribution.

ABSTRACT: Anderson localization, the unusual phenomenon discovered in a disordered medium, describes the phase transition from the extended to localized state. Owing to the interference in multiple elastic scattering, this concept is firstly demonstrated in an electron system, then to photon and matter waves. However, Anderson localization has not been observed for polaritonic waves with its unique features of strong field confinement and tunability. Here, Anderson localization of plasmon polaritons is experimentally reported in a flat graphene sheet simultaneously with homogenous charge carrier and random tensile-strain distributions. By selectively choosing different disordered levels, the transition from quasi-expansion to weak localization, and finally Anderson localization are observed. Relying

SUBMITTER: Duan J 

PROVIDER: S-EPMC6446603 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature