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Hoang TB, Akselrod GM, Argyropoulos C, et al. Ultrafast spontaneous emission source using plasmonic nanoantennas. Nat Commun. 2015;6:7788doi: 10.1038/ncomms8788.
Hoang, T. B., Akselrod, G. M., Argyropoulos, C., Huang, J., Smith, D. R., & Mikkelsen, M. H. (2015). Ultrafast spontaneous emission source using plasmonic nanoantennas. Nature communications, 67788. https://doi.org/10.1038/ncomms8788
Hoang, Thang B, et al. "Ultrafast spontaneous emission source using plasmonic nanoantennas." Nature communications vol. 6 (2015): 7788. doi: https://doi.org/10.1038/ncomms8788
Hoang TB, Akselrod GM, Argyropoulos C, Huang J, Smith DR, Mikkelsen MH. Ultrafast spontaneous emission source using plasmonic nanoantennas. Nat Commun. 2015 Jul 27;6:7788. doi: 10.1038/ncomms8788. PMID: 26212857; PMCID: PMC4525280.
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Nat Commun. 2015 Jul 27;6:7788. doi: 10.1038/ncomms8788.

Ultrafast spontaneous emission source using plasmonic nanoantennas.

Nature communications

Thang B Hoang, Gleb M Akselrod, Christos Argyropoulos, Jiani Huang, David R Smith, Maiken H Mikkelsen

Affiliations

  1. 1] Department of Physics, Duke University, Durham, North Carolina 27708, USA. [2] Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, USA.
  2. 1] Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, USA. [2] Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA.
  3. 1] Department of Physics, Duke University, Durham, North Carolina 27708, USA. [2] Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, USA. [3] Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA.

PMID: 26212857 PMCID: PMC4525280 DOI: 10.1038/ncomms8788

Abstract

Typical emitters such as molecules, quantum dots and semiconductor quantum wells have slow spontaneous emission with lifetimes of 1-10 ns, creating a mismatch with high-speed nanoscale optoelectronic devices such as light-emitting diodes, single-photon sources and lasers. Here we experimentally demonstrate an ultrafast (<11 ps) yet efficient source of spontaneous emission, corresponding to an emission rate exceeding 90 GHz, using a hybrid structure of single plasmonic nanopatch antennas coupled to colloidal quantum dots. The antennas consist of silver nanocubes coupled to a gold film separated by a thin polymer spacer layer and colloidal core-shell quantum dots, a stable and technologically relevant emitter. We show an increase in the spontaneous emission rate of a factor of 880 and simultaneously a 2,300-fold enhancement in the total fluorescence intensity, which indicates a high radiative quantum efficiency of ∼50%. The nanopatch antenna geometry can be tuned from the visible to the near infrared, providing a promising approach for nanophotonics based on ultrafast spontaneous emission.

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