Plasmon-enhanced quadrupole transitions of Rydberg excitons in
Phys. Rev. B 112, 195306 – Published 19 November, 2025
DOI: https://doi.org/10.1103/5gt4-ghhf
Abstract
A mechanism for amplification of weak quadrupole transitions of Rydberg excitons in by a plasmonic nanostructure is investigated. The theoretical description of exciton-plasmon interaction is presented and a field averaging approximation is proposed for calculations involving large excitons. Various types of copper, silver and gold-based plasmonic nanostructures are considered and their potential for enhancing quadrupole transitions is evaluated. The change of eigenstates and eigenenergies as the exciton approaches the semiconductor-metal interface is also analyzed.
