title: Reversible switching of ultrastrong light-molecule coupling.
abstract: We demonstrate that photochromic molecules enable switching from the weak- to ultrastrong-coupling regime reversibly, by using all-optical control. This switch is achieved by photochemically inducing conformational changes in the molecule. Remarkably, a Rabi splitting of 700 meV is measured at room temperature, corresponding to 32% of the molecular transition energy. A similar coupling strength is demonstrated in a plasmonic structure. Such systems present a unique combination of coupling strength and functional capacities.
authors.affiliation: ISIS, Université de Strasbourg and CNRS (UMR 7006), 8 allée Gaspard Monge, 67000, Strasbourg, France.
authors.forename: T
authors.initials: T
authors.lastname: Schwartz
authors.forename: J A
authors.initials: JA
authors.lastname: Hutchison
authors.forename: C
authors.initials: C
authors.lastname: Genet
authors.forename: T W
authors.initials: TW
authors.lastname: Ebbesen