Reversible switching of ultrastrong light-molecule coupling

T. Schwartz*, J. A. Hutchison, C. Genet, T. W. Ebbesen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

548 Scopus citations


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.

Original languageEnglish
Article number196405
JournalPhysical Review Letters
Issue number19
StatePublished - 11 May 2011
Externally publishedYes


FundersFunder number
Seventh Framework Programme227577


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