Scattering exceptional point in the visible.

ABSTRACT: Exceptional point (EP) is a special degeneracy of non-Hermitian systems. One-dimensional transmission systems operating at EPs are widely studied and applied to chiral conversion and sensing. Lately, two-dimensional systems at EPs have been exploited for their exotic scattering features, yet so far been limited to only the non-visible waveband. Here, we report a universal paradigm for achieving a high-efficiency EP in the visible by leveraging interlayer loss to accurately control the interplay between the lossy structure and scattering lightwaves. A bilayer framework is demonstrated to reflect back the incident light from the left side ( | r_-1 | >0.999) and absorb the incident light from the right side ( | r₊₁ | < 10^-4). As a proof of concept, a bilayer me

SUBMITTER: He T 

PROVIDER: S-EPMC10504253 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature