期刊
NANO LETTERS
卷 22, 期 1, 页码 22-28出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c02835
关键词
dipole-dipole interactions; plasmonic lattice; surface lattice resonance; long-range resonance energy transfer
类别
资金
- U.S. Department of Energy, Office of Basic Sciences [DE-SC0017717]
- National Science Foundation [DMR-1654676, DMR1904385]
- U.S. Department of Defense Vannevar Bush Faculty Fellowship [N00014-17-1-3023]
In this experiment, long-range dipole-dipole interactions are achieved through surface lattice resonances in a plasmonic nanoparticle lattice, paving the way for engineering and controlling interactions between ensembles of emitters at room temperature.
Spontaneous emission of quantum emitters can be enhanced by increasing the local density of optical states, whereas engineering dipole-dipole interactions requires modifying the two-point spectral density function. Here, we experimentally demonstrate long-range dipole-dipole interactions (DDIs) mediated by surface lattice resonances in a plasmonic nanoparticle lattice. Using angle-resolved spectral measurements and fluorescence lifetime studies, we show that unique nanophotonic modes mediate long-range DDI between donor and acceptor molecules. We observe significant and persistent DDI strengths for a range of densities that map to similar to 800 nm mean nearest-neighbor separation distance between donor and acceptor dipoles, a factor of similar to 100 larger than free space. Our results pave the way to engineer and control long-range DDIs between an ensemble of emitters at room temperature.
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