Year: 2025
Type: article
Abstract: Coherent coupling of light and single molecules enables the development of next-generation room temperature-capable nanophotonic devices. Small mode-volume optical fields can be achieved with plasmonics, but challenges remain in placing oriented emitter molecules inside plasmonic cavities to access strong coupling consistently in emission. Using DNA origami, single-emitter molecules can be aligned inside subnanometric cavities created between a gold nanoparticle and a gold mirror. We observe that the exact design of DNA scaffolding architecture surrounding a cyanine dye changes how its emission couples to the nanocavity, as well as how Au atoms respond to the optical forces, leading to continuous tuning of the dominant plasmonic mode. Through this, we show how strong coupling between three different dyes and the plasmon resonance always leads to low-energy light emission, independent of detuning.
Institution: University of Cambridge
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Awards: G3071523178, Ubiquitous Optical Healthcare Technologies (ubOHT) Programme Grant, Mid-IR vibration-assisted luminescence & spectroscopies (MIRVALS), Pico-Photonic Forces at the Atomic Scale, G4498617803, Mid-Infrared Vibrational-Assisted Detectors (MIRVID), EPSRC Centre for Doctoral Training in Sustainable and Functional Nano
OpenAlex ID: W4407157336