title: Plasmon-exciton hybridization in ZnO quantum-well Al nanodisc heterostructures.
abstract: We demonstrate the formation of a hybridized plasmon-exciton state exhibiting strong exciton-plasmon coupling in ZnO/Zn(0.85)Mg(0.15)O single quantum wells capped with arrays of Al nanodiscs. Tuning the quantum-well width and the diameter and pitch of the Al nanodisc arrays facilitates a transition from the weak-coupling regime into the strong coupling regime. Finite-difference time-domain simulations substantiate the localization of the plasmonic quadrupole moment within the ZnO quantum-well layer, resulting in a hybridized plasmonexciton state demonstrating a Rabi splitting of roughly 15 meV in heterostructures that exhibit a prominent plasmon quadrupole mode. The significant tunability offered by quantum-well heterostructures like those discussed here provides a flexible system for controlling exciton plasmon coupling in a device-compatible thin-film architecture.
authors.affiliation: Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, Tennessee 37234-0106, United States. lawriebj@ornl.gov
authors.forename: B J
authors.initials: BJ
authors.lastname: Lawrie
authors.forename: K-W
authors.initials: KW
authors.lastname: Kim
authors.forename: D P
authors.initials: DP
authors.lastname: Norton
authors.forename: R F
authors.initials: RF
authors.lastname: Haglund