Room-Temperature Circularly Polarized Single Photon Emission from Eu<sup>3+</sup>/Organic Complexes Coupled to Chiral Plasmonic Nanocavity.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41032280.
- Also identified by DOI 10.1021/acs.nanolett.5c03052.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Room-temperature circularly polarized single-photon sources are crucial for quantum information and photonic technologies. Here we integrated europium (Eu<sup>3+</sup>)-doped organic complexes with chiral plasmonic nanocavities using helicoid-on-mirror (HoM) architecture, achieving giant circularly polarized emission with quantum yield of 40% and dissymmetry factor (<i>g</i><sub>lum</sub>) of 0.40 ± 0.02. The HoM's superchiral hotspot enhances chiral emission through the Purcell effect. Nonlinear dynamics confirms the transition from spontaneous to stimulated chiral photon generation with reduced threshold power. Time-resolved fluorescence spectroscopy shows enhanced radiative rates (0.7 μs vs 360 μs bulk), indicating efficient plasmon-exciton coupling. Single-photon emission with circular polarization characteristics is demonstrated by photon antibunching (<i>g</i><sup>(2)</sup> = 0.30 ± 0.05) at room temperature when the pumping power is below 20 μW. This integration of lanthanide photophysics with chiral plasmonics provides scalable pathways for room-temperature quantum chiral photonics, with applications in quantum information encoding, chiral sensing, and circularly polarized organic light-emitting diodes.