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      Anisotropic Emission from Multilayered Plasmon Resonator Nanocomposites of Isotropic Semiconductor Quantum Dots

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      Author(s)
      Ozel, T.
      Nizamoglu, S.
      Sefunc, M.A.
      Samarskaya, O.
      Ozel, I. O.
      Mutlugun, E.
      Lesnyak, V.
      Gaponik N.
      Eychmuller, A.
      Gaponenko, S. V.
      Demir, Hilmi Volkan
      Date
      2011-01-19
      Source Title
      ACS Nano
      Print ISSN
      1936-0851
      Publisher
      American Chemical Society
      Volume
      5
      Issue
      2
      Pages
      1328 - 1334
      Language
      English
      Type
      Article
      Item Usage Stats
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      154
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      Abstract
      We propose and demonstrate a nanocomposite localized surface plasmon resonator embedded into an artificial three-dimensional construction. Colloidal semiconductor quantum dots are assembled between layers of metal nanoparticles to create a highly strong plasmon-exciton interaction in the plasmonic cavity. In such a multilayered plasmonic resonator architecture of isotropic CdTe quantum dots, we observed polarized light emission of 80% in the vertical polarization with an enhancement factor of 4.4, resulting in a steady-state anisotropy value of 0.26 and reaching the highest quantum efficiency level of 30% ever reported for such CdTe quantum dot solids. Our electromagnetic simulation results are in good agreement with the experimental characterization data showing a significant emission enhancement in the vertical polarization, for which their fluorescence decay lifetimes are substantially shortened by consecutive replication of our unit cell architecture design. Such strongly plasmon-exciton coupling nanocomposites hold great promise for future exploitation and development of quantum dot plasmonic biophotonics and quantum dot plasmonic optoelectronics.
      Keywords
      Localized surface plasmons
      Excitons
      Fluorescence anisotropy
      Resonators
      Semiconductor quantum dots
      Layer-by-layer assembly
      Nanocomposites
      Permalink
      http://hdl.handle.net/11693/13375
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/nn1030324
      Collections
      • Department of Electrical and Electronics Engineering 3702
      • Department of Physics 2397
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
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