Switching of resonance energy transfer mechanism in a dense array of II-VI quantum dots

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Belyaev, K.G.^1 ; Shubina, T.V.^1 ; Semina, M.A.^1 ; Rodina, A.V.^1 ; Toropov, A.A.^1 ; Ivanov, S.V.^1

Ioffe Institute, 26 Polytekhnicheskaya, St. Petersburg

194021, Russia^1

关键词: Different sizes;    Energy transfer mechanisms;    Excited levels;    Ground level;    II-VI quantum dots;    Photoluminescence excitation spectroscopy;    Quantum levels;    Resonance energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012155/pdf
DOI  :  10.1088/1742-6596/741/1/012155

来源: IOP

【 摘 要 】

We report on Förster resonance energy transfer (FRET) in a dense array of II-VI epitaxial quantum dots (QDs). Besides FRET between the ground states of QDs of different sizes, we observe the energy transfer via the excited levels of large QDs which are in resonance with the ground levels of small QDs. The switching of dominant energy transfer mechanism, revealed by photoluminescence excitation spectroscopy, takes place at the energy controlled by the architecture of quantum levels in these arrays.