Theoretical investigation explores exciton-plasmon interaction in various metal nanostructures, indicating potential enhancements in quadrupole transitions.
A mechanism for amplification of weak quadrupole transitions of Rydberg excitons in Cu₂O 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.
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Ziemkiewicz et al. (2025) studied this question.
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