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Zhang, Hongyi, Huo, Yongheng ORCID: 0000-0002-0310-3078, Lindfors, Klas ORCID: 0000-0002-6482-5605, Chen, Yonghai, Schmidt, Oliver G., Rastelli, Armando ORCID: 0000-0002-1343-4962 and Lippitz, Markus ORCID: 0000-0003-1218-6511 (2015). Narrow-line self-assembled GaAs quantum dots for plasmonics. Appl. Phys. Lett., 106 (10). MELVILLE: AMER INST PHYSICS. ISSN 1077-3118

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Abstract

We demonstrate efficient coupling of excitons in near-surface GaAs quantum dots (QDs) to surface-plasmon polaritons. We observe distinct changes in the photoluminescence of the emitters as the distance between the QDs and the gold interface decreases. Based on an electric point-dipole model, we identify the surface plasmon launching rates for different QD-surface distances. While in conventional far-field experiments only a few percent of the emitted photons can be collected due to the high refractive index semiconductor substrate, already for distances around 30 nm the plasmon launching-rate becomes comparable to the emission rate into bulk photon modes, thus much larger than the photon collection rate. For even smaller distances, the degrading optical properties of the emitter counterweight the increasing coupling efficiency to plasmonic modes. (C) 2015 AIP Publishing LLC.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhang, Hongyi UNSPECIFIED UNSPECIFIED UNSPECIFIED Huo, Yongheng UNSPECIFIED orcid.org/0000-0002-0310-3078 UNSPECIFIED Lindfors, Klas UNSPECIFIED orcid.org/0000-0002-6482-5605 UNSPECIFIED Chen, Yonghai UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Oliver G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rastelli, Armando UNSPECIFIED orcid.org/0000-0002-1343-4962 UNSPECIFIED Lippitz, Markus UNSPECIFIED orcid.org/0000-0003-1218-6511 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-409941
DOI:	10.1063/1.4914387
Journal or Publication Title:	Appl. Phys. Lett.
Volume:	106
Number:	10
Date:	2015
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1077-3118
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CDSE/ZNS NANOCRYSTAL; LIGHT; NANOANTENNA; EMISSION; FLUORESCENCE; INTERFERENCE; SURFACES; PHOTON Multiple languages Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/40994