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Plasmonic Modes and Fluorescence Enhancement Coupling Mechanism: A Case with a Nanostructured Grating
Margherita Angelini1, Eliana Manobianco2, Paola Pellacani2
1Department of Physics, University of Pavia, Via Bassi 6, 27100 Pavia, Italy.
Nanomaterials (Basel, Switzerland)
|December 11, 2022
Summary
Plasmonic metasurfaces enhance fluorophore emission efficiency by tuning fluorescence spectral shape and signal strength. This enhancement correlates with strong plasmonic mode signatures, confirmed by optical measurements and simulations.
Area of Science:
- Nanophotonics
- Plasmonics
- Spectroscopy
Background:
- Plasmonic metasurfaces offer advanced sensing capabilities.
- Fluorescence is a key tool in plasmonic sensing applications.
Purpose of the Study:
- Investigate the influence of plasmonic metasurfaces on fluorophore emission efficiency.
- Understand the coupling mechanisms between plasmonic modes and fluorescence processes.
Main Methods:
- Utilized well-characterized plasmonic resonant structures.
- Performed extended optical analysis.
- Conducted finite-difference time-domain (FDTD) simulations.
Main Results:
- Demonstrated spectral shape dependence of fluorescence on plasmonic field distribution.
- Observed signal enhancement of fluorescence.
- Correlated maximum enhancement with strong plasmonic mode signatures.
Conclusions:
- Plasmonic metasurfaces significantly influence fluorescence emission.
- Coupling between plasmonic modes and fluorescence is crucial for signal enhancement.
- Findings provide insights for designing plasmonic sensors.
