Photonic crystal enhanced fluorescence using a hybrid hexagonal boron nitride spacer and plasmonic gold cryosoret cavity.

ABSTRACT: The introduction of photonic technologies in fluorescence-based detection platforms such as point-of-care diagnostics enables highly reliable quantitative and qualitative analysis. Photonic crystals (PCs) and plasmonic nanoparticles (NPs) have individually shown promise, and combining them with radiating dipoles is expected to yield synergistic effects. However, integration has been thus far hindered by severe fluorescence quenching as a result of metal-fluorophore proximity in the so-called 'zone of inactivity'. Here, we show that ultrathin hexagonal boron nitride (hBN) can serve as an active insulating spacer to suppress nonradiative quenching while maintaining strong coupling between the localized surface plasmon resonance of gold nanoparticles and the guided mode resonance of an underl

SUBMITTER: Bhattacharya S 

PROVIDER: S-EPMC12606722 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature