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

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 n...

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Detalles Bibliográficos
Autores principales: Papierska, Joanna, Witkowski, Bartłomiej S., Derkachova, Anastasiya, Korona, Krzysztof P., Binder, Johannes, Gałkowski, Krzysztof, Wachnicki, Łukasz, Godlewski, Marek, Dietl, Tomasz, Suffczyński, Jan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2013
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3646165/
https://www.ncbi.nlm.nih.gov/pubmed/23662095
http://dx.doi.org/10.1007/s11468-013-9490-5
Descripción
Sumario: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.

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