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

作者：Ozel Tuncay; Nizamoglu Sedat; Sefunc Mustafa A; Samarskaya Olga; Ozel Ilkem O; Mutlugun Evren; Lesnyak Vladimir; Gaponik Nikolai; Eychmuller Alexander; Gaponenko Sergey V^*; Demir Hilmi Volkan

来源：ACS Nano, 2011, 5(2): 1328-1334.

DOI：10.1021/nn1030324

• localized surface plasmons
• excitons
• fluorescence anisotropy
• resonators
• semiconductor quantum dots
• layer-by-layer assembly
• nanocomposites

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.

• 出版日期2011-2
• 单位南阳理工学院