Open AccessStrongly Coupled Exciton–Surface Lattice Resonances Engineer Long-Range Energy Propagation
Author(s) -
Ravindra Kumar Yadav,
Matthew Otten,
Weijia Wang,
Cristian L. Cortes,
David J. Gosztola,
Gary P. Wiederrecht,
Stephen K. Gray,
Teri W. Odom,
J. K. Basu
Publication year - 2020
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/acs.nanolett.0c01236
Subject(s) - exciton , photoluminescence , excitation , quantum dot , quantum optics , plasmon , lattice (music) , materials science , semiconductor , dipole , quantum , optoelectronics , condensed matter physics , molecular physics , physics , optics , quantum mechanics , acoustics
Achieving propagation lengths in hybrid plasmonic systems beyond typical values of tens of micrometers is important for quantum plasmonics applications. We report long-range optical energy propagation due to excitons in semiconductor quantum dots (SQDs) being strongly coupled to surface lattice resonance (SLRs) in silver nanoparticle arrays. Photoluminescence (PL) measurements provide evidence of an exciton-SLR (ESLR) mode extending at least 600 μm from the excitation region. We also observe additional energy propagation with range well beyond the ESLR mode and with dependency on the coupling strength, g , between SQDs and SLR. Cavity quantum electrodynamics calculations capture the nature of the PL spectra for consisten g values, while coupled dipole calculations show a SQD number-dependent electric field decay profile consistent with the experimental spatial PL profile. Our results suggest an exciting direction wherein SLRs mediate long-range interactions between SQDs, having possible applications in optoelectronics, sensing, and quantum information science.
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