Strong plasmonic enhancement of biexciton emission: controlled coupling of a single quantum dot to a gold nanocone antenna
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 non-radiative...
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| creator | Matsuzaki, Korenobu Vassant, Simon Hsuan-Wei, Liu Dutschke, Anke Hoffmann, Björn Chen, Xuewen Christiansen, Silke Buck, Matthew R Hollingsworth, Jennifer A Götzinger, Stephan Sandoghdar, Vahid |
| description | 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 non-radiative 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. |
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| issn | 2331-8422 |
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| subjects | Antennas Augers Colloiding Decay rate Electrons Emissions control Gold Nano-optics Optoelectronics Photons Quantum dots Quantum efficiency |
| title | Strong plasmonic enhancement of biexciton emission: controlled coupling of a single quantum dot to a gold nanocone antenna |
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