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Updated: Oct 16, 2025
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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
Published on: September 5, 2017
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Long-Range Dipole-Dipole Interactions in a Plasmonic Lattice
Ashwin K Boddeti1, Jun Guan, Tyler Sentz1
1Elmore Family School of Electrical and Computer Engineering, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States.
Nano Letters
|October 21, 2021
Summary
Researchers engineered long-range dipole-dipole interactions (DDIs) using plasmonic nanoparticle lattices. These interactions, mediated by nanophotonic modes, were significantly stronger than in free space, enabling control over quantum emitters.
Area of Science:
- Nanophotonics
- Quantum Optics
- Plasmonics
Background:
- Spontaneous emission enhancement relies on local density of optical states.
- Engineering dipole-dipole interactions (DDIs) requires modifying spectral density functions.
Purpose of the Study:
- To experimentally demonstrate long-range DDIs mediated by surface lattice resonances.
- To investigate nanophotonic modes responsible for mediating DDIs between quantum emitters.
Main Methods:
- Utilizing angle-resolved spectral measurements.
- Conducting fluorescence lifetime studies.
- Employing plasmonic nanoparticle lattices to engineer DDIs.
Main Results:
- Observed significant and persistent DDIs mediated by unique nanophotonic modes.
- Achieved long-range DDIs with mean nearest-neighbor separations up to ~800 nm.
- Demonstrated DDIs ~100 times stronger than in free space.
Conclusions:
- Surface lattice resonances in plasmonic nanoparticle lattices enable long-range DDIs.
- Nanophotonic modes are key to mediating DDIs between donor and acceptor molecules.
- Results pave the way for engineering DDIs in ensembles of emitters at room temperature.
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