Applied Physics B

, Volume 93, Issue 1, pp 199–202

Controlling the energy transfer between near-field optically coupled ZnO quantum dots

Authors

    • Graduate School of EngineeringThe University of Tokyo
  • H. Jeong
    • Graduate School of EngineeringThe University of Tokyo
  • M. Ohtsu
    • Graduate School of EngineeringThe University of Tokyo
    • Solution-Oriented Research for Science and Technology (SORST)Japan Science and Technology Agency
Article

DOI: 10.1007/s00340-008-3154-8

Cite this article as:
Yatsui, T., Jeong, H. & Ohtsu, M. Appl. Phys. B (2008) 93: 199. doi:10.1007/s00340-008-3154-8

Abstract

We performed time-resolved spectroscopy of ZnO quantum dots (QD), and observed exciton energy transfer and dissipation between QD via an optical near-field interaction. Two different sizes of ZnO QD with resonant energy levels were mixed to test the energy transfer and dissipation using time-resolved photoluminescence spectroscopy. The estimated energy transfer time was 144 ps. Furthermore, we demonstrated that the ratio of energy transfer between the resonant energy states could be controlled.

PACS

78.67.Hc81.07.Ta
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© Springer-Verlag 2008