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Updated: Jan 28, 2026
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Spatially defined molecular emitters coupled to plasmonic nanoparticle arrays
Jianxi Liu1,2, Weijia Wang3, Danqing Wang3
1State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, Northwestern Polytechnical University, Xi'an, 710072 Shaanxi, People's Republic of China.
Summary
Metal-organic frameworks (MOFs) on plasmonic nanoparticles exhibit exciton-plasmon coupling. This hybrid structure enhances emission intensity, establishing MOFs as versatile emitters for energy transfer applications.
Area of Science:
- Plasmonics
- Materials Science
- Nanotechnology
- Photophysics
Background:
- Metal-organic frameworks (MOFs) are crystalline porous materials with tunable optical properties.
- Plasmonic nanoparticle arrays support surface lattice resonances (SLRs), which are collective electron oscillations.
- Exciton-plasmon coupling is crucial for light-matter interactions in hybrid nanostructures.
Purpose of the Study:
- To investigate exciton-plasmon coupling between MOFs and plasmonic nanoparticle arrays.
- To explore the potential of MOF-plasmonic hybrids for enhanced light emission.
- To understand the underlying coupling mechanisms and their spectral characteristics.
Main Methods:
- Conformal coating of Zn-porphyrin MOF thin films onto silver nanoparticle arrays via dip coating.
- Characterization of optical properties using transmission, transient absorption, and photoluminescence spectroscopy.
- Tuning of surface lattice resonances by altering the refractive index environment and nanoparticle array periodicity.
Main Results:
- Observation of SLR-like mixed modes resulting from exciton-SLR coupling in NP@MOF structures.
- Spectral position of the mixed mode was tunable by environmental refractive index and array periodicity.
- Photoluminescence exhibited mode splitting interpreted as Fano profile modulation, with a 16-fold emission enhancement compared to pristine MOFs.
Conclusions:
- MOFs coupled with plasmonic nanostructures support exciton-plasmon modes better described by weak coupling.
- Hybrid NP@MOF structures demonstrate significant enhancement in emission intensity.
- This work establishes MOFs as crystalline molecular emitters capable of efficient energy exchange and transfer with plasmonic systems.
Keywords:
conformal coatingmetal–organic frameworkphotoluminescenceplasmonic nanoparticle arrayssurface lattice resonanceMore Related Videos
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