Anisotropic Emission from Multi layered Plasmon Resonator Nanocomposites of Isotropic Semiconductor Quantum Dots


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Ozel T., Nizamoglu S., Sefunc M. A. , Samarskaya O., Ozel I. O. , Mutlugun E. , et al.

ACS NANO, cilt.5, ss.1328-1334, 2011 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 5 Konu: 2
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1021/nn1030324
  • Dergi Adı: ACS NANO
  • Sayfa Sayısı: ss.1328-1334

Özet

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.