TITLE

Enhancement in middle-ultraviolet emission in a surface-plasmon-assisted coaxial nanocavity

AUTHOR(S)
Qingrui Zhuang; Xia Feng; Zhilin Yang; Junyong Kang; Xiaoli Yuan
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p091902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Cathodoluminescence spectrum of a single Zn–Zn2SiO4 core-shell nanocable exhibits a strong emission at 293 nm accompanied with a weaker splitting peak at its long wavelength side. Experiment and ab initio calculation results indicate that the UV emissions are associated with the Zn2SiO4 surface states. Finite-difference time-domain simulations show that a surface-plasmon-assisted nanocavity can selectively confine and enhance the electric field energy of the 293 nm light due to the smallest mode volume and the highest finesse among surface plasmon resonance, whispering gallery, and waveguide modes. Further temperature dependence experiment and correlative theoretical derivation suggest that the splitting is associated with a strong coupling between the nanocavity and the emitter.
ACCESSION #
34360735

 

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