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

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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.

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Authors and Affiliations

  1. Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8656, Japan

    T. Yatsui, H. Jeong & M. Ohtsu

  2. Solution-Oriented Research for Science and Technology (SORST), Japan Science and Technology Agency, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8656, Japan

    M. Ohtsu

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  1. T. Yatsui
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  2. H. Jeong
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  3. M. Ohtsu
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Correspondence to T. Yatsui.

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Yatsui, T., Jeong, H. & Ohtsu, M. Controlling the energy transfer between near-field optically coupled ZnO quantum dots. Appl. Phys. B 93, 199–202 (2008). https://doi.org/10.1007/s00340-008-3154-8

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  • DOI: https://doi.org/10.1007/s00340-008-3154-8

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