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Exciton diffusion and annihilation in nanophotonic Purcell landscapes

T. Raziman, C. Peter Visser, Shaojun Wang, Jaime Gomez Rivas and Alberto Curto (UGent)
(2022) ADVANCED OPTICAL MATERIALS. 10(17).
Author
Organization
Abstract
Excitons spread through diffusion and interact through exciton-exciton annihilation. Nanophotonics can counteract the resulting decrease in light emission. However, conventional enhancement treats emitters as immobile and non-interacting. It neglects exciton redistribution between regions with different enhancements and the increase in non-radiative decay at high exciton densities. Here, the authors went beyond the localized Purcell effect to exploit exciton dynamics and turn their typically detrimental impact into additional emission. As interacting excitons diffuse through optical hotspots, the balance of excitonic and nanophotonic properties leads to either enhanced or suppressed photoluminescence. The dominant enhancement mechanisms are identified in the limits of high and low diffusion and annihilation. Diffusion lifts the requirement of spatial overlap between excitation and emission enhancements, which are harnessed to maximize emission from highly diffusive excitons. In the presence of annihilation, improved enhancement is predicted at increasing powers in nanophotonic systems dominated by emission enhancement. The guidelines are relevant for efficient and high-power light-emitting diodes and lasers tailored to the rich dynamics of excitonic materials such as monolayer semiconductors, perovskites, or organic crystals.
Keywords
CARBON NANOTUBES, FLUORESCENCE, EMISSION, SILICON, BOUNDARIES, SCATTERING, MONOLAYER, TRANSPORT, exciton transport, exciton-exciton annihilation, Mie resonances, nanoparticle arrays, plasmonic resonances, Purcell effect

Citation

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MLA
Raziman, T., et al. “Exciton Diffusion and Annihilation in Nanophotonic Purcell Landscapes.” ADVANCED OPTICAL MATERIALS, vol. 10, no. 17, 2022, doi:10.1002/adom.202200103.
APA
Raziman, T., Visser, C. P., Wang, S., Rivas, J. G., & Curto, A. (2022). Exciton diffusion and annihilation in nanophotonic Purcell landscapes. ADVANCED OPTICAL MATERIALS, 10(17). https://doi.org/10.1002/adom.202200103
Chicago author-date
Raziman, T., C. Peter Visser, Shaojun Wang, Jaime Gomez Rivas, and Alberto Curto. 2022. “Exciton Diffusion and Annihilation in Nanophotonic Purcell Landscapes.” ADVANCED OPTICAL MATERIALS 10 (17). https://doi.org/10.1002/adom.202200103.
Chicago author-date (all authors)
Raziman, T., C. Peter Visser, Shaojun Wang, Jaime Gomez Rivas, and Alberto Curto. 2022. “Exciton Diffusion and Annihilation in Nanophotonic Purcell Landscapes.” ADVANCED OPTICAL MATERIALS 10 (17). doi:10.1002/adom.202200103.
Vancouver
1.
Raziman T, Visser CP, Wang S, Rivas JG, Curto A. Exciton diffusion and annihilation in nanophotonic Purcell landscapes. ADVANCED OPTICAL MATERIALS. 2022;10(17).
IEEE
[1]
T. Raziman, C. P. Visser, S. Wang, J. G. Rivas, and A. Curto, “Exciton diffusion and annihilation in nanophotonic Purcell landscapes,” ADVANCED OPTICAL MATERIALS, vol. 10, no. 17, 2022.
@article{01GPPY3FXBCZ2KHYVNH9CRJ1AF,
  abstract     = {{Excitons spread through diffusion and interact through exciton-exciton annihilation. Nanophotonics can counteract the resulting decrease in light emission. However, conventional enhancement treats emitters as immobile and non-interacting. It neglects exciton redistribution between regions with different enhancements and the increase in non-radiative decay at high exciton densities. Here, the authors went beyond the localized Purcell effect to exploit exciton dynamics and turn their typically detrimental impact into additional emission. As interacting excitons diffuse through optical hotspots, the balance of excitonic and nanophotonic properties leads to either enhanced or suppressed photoluminescence. The dominant enhancement mechanisms are identified in the limits of high and low diffusion and annihilation. Diffusion lifts the requirement of spatial overlap between excitation and emission enhancements, which are harnessed to maximize emission from highly diffusive excitons. In the presence of annihilation, improved enhancement is predicted at increasing powers in nanophotonic systems dominated by emission enhancement. The guidelines are relevant for efficient and high-power light-emitting diodes and lasers tailored to the rich dynamics of excitonic materials such as monolayer semiconductors, perovskites, or organic crystals.}},
  articleno    = {{2200103}},
  author       = {{Raziman, T. and  Visser, C. Peter and  Wang, Shaojun and  Rivas, Jaime Gomez and Curto, Alberto}},
  issn         = {{2195-1071}},
  journal      = {{ADVANCED OPTICAL MATERIALS}},
  keywords     = {{CARBON NANOTUBES,FLUORESCENCE,EMISSION,SILICON,BOUNDARIES,SCATTERING,MONOLAYER,TRANSPORT,exciton transport,exciton-exciton annihilation,Mie resonances,nanoparticle arrays,plasmonic resonances,Purcell effect}},
  language     = {{eng}},
  number       = {{17}},
  pages        = {{8}},
  title        = {{Exciton diffusion and annihilation in nanophotonic Purcell landscapes}},
  url          = {{http://doi.org/10.1002/adom.202200103}},
  volume       = {{10}},
  year         = {{2022}},
}
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