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

作者：Papierska Joanna; Witkowski Bartlomiej S; Derkachova Anastasiya; Korona Krzysztof P; Binder Johannes; Galkowski Krzysztof; Wachnicki Lukasz; Godlewski Marek; Dietl Tomasz; Suffczynski Jan^*

来源：Plasmonics, 2013, 8(2): 913-919.

DOI：10.1007/s11468-013-9490-5

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

A simple fabrication method of silver (Ag) nano-islands 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.

• 出版日期2013-6