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Strong plasmonic enhancement of biexciton emission: controlled coupling of a single quantum dot to a gold nanocone antenna

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Matsuzaki,  Korenobu
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Liu,  Hsuan-Wei
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;

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Hoffmann,  Bjoern
Micro- & Nanostructuring, Technology Development and Service Units, Max Planck Institute for the Science of Light, Max Planck Society;

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Chen,  Xuewen
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;
Huazhong University of Science & Technology;

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Christiansen,  Silke
Christiansen Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Helmoltz-Center Berlin for Materials & Energy (HZB);

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Goetzinger,  Stephan
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Sandoghdar,  Vahid
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Matsuzaki, K., Vassant, S., Liu, H.-W., Dutschke, A., Hoffmann, B., Chen, X., et al. (2017). Strong plasmonic enhancement of biexciton emission: controlled coupling of a single quantum dot to a gold nanocone antenna. SCIENTIFIC REPORTS, 7: 42307. doi:10.1038/srep42307.


Cite as: http://hdl.handle.net/21.11116/0000-0000-878C-A
Abstract
Multiexcitonic transitions and emission of several photons per excitation comprise a very attractive feature of semiconductor quantum dots for optoelectronics applications. However, these higher-order radiative processes are usually quenched in colloidal quantum dots by Auger and other nonradiative decay channels. To increase the multiexcitonic quantum efficiency, several groups have explored plasmonic enhancement, so far with moderate results. By controlled positioning of individual quantum dots in the near field of gold nanocone antennas, we enhance the radiative decay rates of monoexcitons and biexcitons by 109 and 100 folds at quantum efficiencies of 60 and 70%, respectively, in very good agreement with the outcome of numerical calculations. We discuss the implications of our work for future fundamental and applied research in nano-optics.