摘要
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.
基金
This work was fi nancially supported by the National Natural Science Foundation of China(NSFC,Nos.90606023,10574003,10523001)
a joint project with Research Grants Council of Hong Kong(NSFC/RGC 20731160012)
national key projects(2002CB613505,2007CB936202,MOST)
D.P.Yu is supported by the Cheung Kong Scholar Program,Ministry of Education,P.R.China.
