Strongly Coupled Exciton-Surface Lattice Resonances Engineer Long-Range Energy Propagation

Ravindra Kumar Yadav, Matthew Otten, Weijia Wang, Cristian L. Cortes, David J. Gosztola, Gary P. Wiederrecht, Stephen K. Gray, Teri W. Odom, Jaydeep K. Basu

Research output: Contribution to journalArticle

Abstract

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 consistent 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.

Original languageEnglish
Pages (from-to)5043-5049
Number of pages7
JournalNano letters
Volume20
Issue number7
DOIs
Publication statusPublished - Jul 8 2020

Keywords

  • Energy propagation
  • Plasmon lattice
  • Semiconductor quantum dot
  • Strong coupling
  • Surface lattice resonances

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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  • Cite this

    Yadav, R. K., Otten, M., Wang, W., Cortes, C. L., Gosztola, D. J., Wiederrecht, G. P., Gray, S. K., Odom, T. W., & Basu, J. K. (2020). Strongly Coupled Exciton-Surface Lattice Resonances Engineer Long-Range Energy Propagation. Nano letters, 20(7), 5043-5049. https://doi.org/10.1021/acs.nanolett.0c01236