Title:
Strong plasmonic enhancement of biexciton emission
Subtitle:
controlled coupling of a single quantum dot to a gold nanocone antenna
Author(s):
Matsuzaki, Korenobu; Vassant, Simon; Liu, Hsuan-Wei; Dutschke, Anke; Hoffmann, Björn; Chen, Xuewen; Christiansen, Silke H.; Buck, Matthew R.; Hollingsworth, Jennifer A.; Götzinger, Stephan; Sandoghdar, Vahid
Year of publication:
2017
Available Date:
2018-12-13T11:58:42Z
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.
Part of Identifier:
ISSN (print): 2045-2322
Keywords:
Multiexcitonic transitions and emission
semiconductor quantum dots
optoelectronics
nano-optics
DDC-Classification:
539 Moderne Physik
Publication Type:
Wissenschaftlicher Artikel
URL of the Original Publication:
DOI of the Original Publication:
Journaltitle:
Scientific Reports
Department/institution:
Physik
Institut für Experimentalphysik
Comments:
Der Artikeöl wurde in einer reinen Open-Access-Zeitschrift publiziert.