Direct measurement of topological invariants in a double emitter system including plasmonic antennae

In the context of nonconservative open systems, multilayers serve as valuable emitters. Recent studies have shed light on the non-Hermitian nature of these multilayers, presenting exciting opportunities for further exploration and understanding. Here, a multilayer decorated with plasmonic antennae has been examined. By combining the surface plasmon polariton (SPP) and waveguide modes, a new hybrid waveguide resonance mode has been generated. Interestingly, the enhancement of spontaneous emission at exceptional points is characterized by dark and bright resonances. It has been demonstrated that in the open hybrid cavity/antenna and non-Hermitian systems the intrinsic nature of the exceptional points improves emission and emission, and therefore, the sensitivity is expected to be influenced