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Plasmonics. 2013 Jun;8(2):913-919. Epub 2013 Feb 12.

Modification of Emission Properties of ZnO Layers due to Plasmonic Near-Field Coupling to Ag Nanoislands.

Author information

  • 1Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69 St., 00-681 Warszawa, Poland.

Abstract

A simple fabrication method of silver (Ag) nanoislands on ZnO films is presented. Continuous wave and time-resolved photoluminescence and transmission are employed to investigate modifications of visible and UV emissions of ZnO brought about by coupling to localized surface plasmons residing on Ag nanoislands. The size of the nanoislands, determining their absorption and scattering efficiencies, is found to be an important factor governing plasmonic modification of optical response of ZnO films. The presence of the Ag nanoislands of appropriate dimensions causes a strong (threefold) increase in emission intensity and up to 1.5 times faster recombination. The experimental results are successfully described by model calculations within the Mie theory.

KEYWORDS:

Exciton; Mie theory; Photoluminescence; Silver nanoislands; Zinc oxide

PMID:
23662095
[PubMed]
PMCID:
PMC3646165
Free PMC Article
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