Mapping of multiple plexcitons in disk supershape hybrid nanoparticles†

Here, we reported the excitation of multiple plexcitons in disk supershape hybrid nanoparticles, both as core–shell and bilayer structures, using the finite difference time domain method. The coupling rates in the Hamiltonian of the multi-oscillators were obtained using a combination of the genetic algorithm and particle swarm optimization for the hybridization of plasmons and excitons. We found that by engineering the morphology of the hybrid nanoparticles, a range of exciton numbers, from few to many, can be achieved in the strong coupling regime. This study has potential applications in photonic and electronic devices based on single- and multi-qubit quantum information processing.