Year: 2024
Type: article
Abstract: Förster resonance energy transfer (FRET), driven by dipole-dipole interactions (DDIs), is widely utilized in chemistry, biology, and nanophotonics. However, conventional FRET is ineffective at donor-acceptor distances exceeding 10 nm and measurements suffer from low signal-to-noise ratios. In this study, we demonstrate significant FRET enhancement and extended interaction distances under ambient conditions by utilizing a bound state in the continuum (BIC) mode within a dielectric metasurface cavity. This enhancement is achieved by leveraging the ultrahigh quality factors, minimal material absorption, and nonlocal effects associated with the BIC mode. Spectrally and angularly resolved photoluminescence (PL) lifetime measurements reveal that the BIC mode significantly increases the FRET rate and interaction distance. The FRET rate is enhanced by up to 70-fold, and the interaction distance is significantly boosted by over an order of magnitude, reaching ∼100 nm. These findings offer valuable insights for achieving long-range, high-efficiency FRET and collective DDIs using loss-less dielectric metasurfaces.
Source: Nano Letters
Institutions: Agency for Science, Technology and Research, Centre National de la Recherche Scientifique, Nanyang Technological University, Institute of Materials Research and Engineering, Centre for OptoElectronics and Biophotonics, CNRS-International-NTU-Thales Research Alliance, Lyon 1 Université, École Centrale de Lyon, Institut des Nanotechnologies de Lyon, Institut National des Sciences Appliquées de Lyon, École d'Ingénieurs en Chimie et Sciences du Numérique, Institut Universitaire de France
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4404565342