Journal
NANO RESEARCH
Volume 2, Issue 1, Pages 47-53Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-009-9001-3
Keywords
Semiconductor nanowires; surface plasmon polaritons; nanowire waveguides; emission enhancement; gratings
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Funding
- National Natural Science Foundation of China (NSFC) [90606023, 10574003, 10523001]
- Research Grants Council of Hong Kong [NSFC/RGC 20731160012]
- MOST [2002CB613505, 2007CB936202]
- Ministry of Education, P. R. China
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The light emission enhancement behavior from single ZnO nanowires integrated with metallic contacts is investigated by micro-photoluminescence measurements. Apart from surface plasmon polaritons at the air/metal interface, the emission of a single ZnO nanowire can be coupled into guided modes of surface exciton-plasmon polaritons (SEPPs). The out-coupling avenues of SEPP guided modes are modeled in the presence of nanostructures, such as corrugation and gratings, on the metal surface. The guided modes of SEPPs in metal-contacted ZnO nanowires are calculated using the effective index method. The enhanced light emission from single semiconductor nanowires shows promise for use in highly efficient nano-emitters and nano-lasers, as well as macroscopic solid state light sources with very high efficiency.
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