Cooperative bi-exponential decay of dye emission coupled via plasmons

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This article demonstrates that the relaxation in the sub-radiant system leads to the population of the sub-radiant states by dephasing the super-radiant Dicke states giving rise to the bi-exponential decay in agreement with the experiments.

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12 p.

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Lyvers, David P.; Moazzezi, Mojtaba; de Silva, Vashista C.; Brown, Dean P.; Urbas, Augustine M.; Rostovtsev, Yuri V. et al. June 22, 2018.

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This article demonstrates that the relaxation in the sub-radiant system leads to the population of the sub-radiant states by dephasing the super-radiant Dicke states giving rise to the bi-exponential decay in agreement with the experiments.

Physical Description

12 p.

Notes

Abstract: Bi-exponential decay of dye fluorescence near the surface of plasmonic metamaterials and core-shell nanoparticles is shown to be an intrinsic property of the coupled system. Indeed, the Dicke, cooperative states involve two groups of transitions: super-radiant, from the most excited to the ground states and sub-radiant, which cannot reach the ground state. The relaxation in the sub-radiant system occurs mainly due to the interaction with the plasmon modes. Our theory shows that the relaxation leads to the population of the sub-radiant states by dephasing the super-radiant Dicke states giving rise to the bi-exponential decay in agreement with the experiments. We use a set of metamaterial samples consisting of gratings of paired silver nanostrips coated with Rh800 dye molecules, having resonances in the same spectral range. The bi-exponential decay is demonstrated for Au\SiO2\ATTO655 coreshell nanoparticles as well, which persists even when averaging over a broad range of the coupling parameter.

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  • Scientific Reports, 2018. London, UK: Nature Publishing Group

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  • Publication Title: Scientific Reports
  • Volume: 8
  • Pages: 1-12
  • Peer Reviewed: Yes

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  • June 22, 2018

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  • March 14, 2018

Accepted Date

  • May 31, 2018

Added to The UNT Digital Library

  • July 5, 2018, 8:11 p.m.

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Lyvers, David P.; Moazzezi, Mojtaba; de Silva, Vashista C.; Brown, Dean P.; Urbas, Augustine M.; Rostovtsev, Yuri V. et al. Cooperative bi-exponential decay of dye emission coupled via plasmons, article, June 22, 2018; London, United Kingdom. (digital.library.unt.edu/ark:/67531/metadc1212017/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.