Abstract
We experimentally verify that surface plasmon (SP) enhances the
photoluminescence (PL) of visible light from Tb<sup>3+</sup>-doped
60SiO<sub>2</sub>-20Al<sub>2</sub>O<sub>3</sub>-20CaF<sub>2</sub>:0.3Tb<sup>3+</sup>,
20Yb<sup>3+</sup> glass ceramics by using electron beam lithography to fabricate
silver nanoparticles on the surface of the glass ceramics. Numerical calculation for
the SP enhancement spectroscopy is achieved by using the finite-difference
time-domain algorithm. A PL enhancement of Tb<sup>3+</sup> by as much as 1.6 times
is observed. The PL enhancement is mainly due to the coupling of excitation from <sup>7</sup>F<sub>6</sub>
to <sup>5</sup>D<sub>4</sub> transition dipole of Tb<sup>3+</sup> ion with SP mode induced from the silver
nanoparticles.
© 2012 Chinese Optics Letters
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