Anisotropic emission from multilayered plasmon resonator nanocomposites of isotropic semiconductor quantum dots.
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.
Department of Physics, Department of Electrical and Electronics Engineering, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, TR-06800, Ankara, Turkey.
Tuncay
T
Ozel
Sedat
S
Nizamoglu
Mustafa A
MA
Sefunc
Olga
O
Samarskaya
Ilkem O
IO
Ozel
Evren
E
Mutlugun
Vladimir
V
Lesnyak
Nikolai
N
Gaponik
Alexander
A
Eychmuller
Sergey V
SV
Gaponenko
Hilmi Volkan
HV
Demir
D000042:Absorption; D016880:Anisotropy; D004560:Electricity; D007700:Kinetics; D008163:Luminescent Measurements; D053761:Nanocomposites / Q000737:chemistry*; D045663:Quantum Dots; D012666:Semiconductors