Tailoring Light-Matter Interactions in Overcoupled Resonator for Biomolecule Recognition and Detection.

ABSTRACT: Plasmonic nanoantennas provide unique opportunities for precise control of light-matter coupling in surface-enhanced infrared absorption (SEIRA) spectroscopy, but most of the resonant systems realized so far suffer from the obstacles of low sensitivity, narrow bandwidth, and asymmetric Fano resonance perturbations. Here, we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient (μ) (OC-Hμ resonator) by precisely controlling the radiation loss channel, the resonator-oscillator coupling channel, and the frequency detuning channel. We observed a strong dependence of the sensing performance on the coupling state, and demonstrated that OC-Hμ resonator has excellent sensing properties of ultra-sensitive (7.25% nm^-1), ultra-broadband (3-10 μm), and immu

SUBMITTER: Li D 

PROVIDER: S-EPMC11427657 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature