Abstract

We experimentally verify that surface plasmon (SP) enhances the photoluminescence (PL) of visible light from Tb³⁺-doped 60SiO₂-20Al₂O₃-20CaF₂:0.3Tb³⁺, 20Yb³⁺ 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 Tb³⁺ by as much as 1.6 times is observed. The PL enhancement is mainly due to the coupling of excitation from ⁷F₆ to ⁵D₄ transition dipole of Tb³⁺ ion with SP mode induced from the silver nanoparticles.

© 2012 Chinese Optics Letters

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