Plasmonic nanostructures have a capability to control
the photoluminescence
(PL) emission properties of optical species and thus can dramatically
enhance the performances of diverse optical systems and devices. Lanthanide
ions typically exhibit multiple PL emission lines. Systematic studies
on the plasmon-enabled selective enhancement for the different emission
lines of lanthanide ions are still highly desired in order to achieve
the fine manipulation on the spectral profile and luminescence intensity
ratio (LIR). Herein we report on the synthesis and PL emission properties
of monodisperse spherical (Au core)@(Y(V,P)O4:Eu) nanostructures,
which integrate the plasmonic and luminescent units into an individual
core@shell structure. The localized surface plasmon resonance adjusted
through control of the size of the Au nanosphere core enables the
systematic modulation of the selective emission enhancement of Eu3+. As revealed by single-particle scattering and PL measurements,
the five luminescence emission lines of Eu3+originating
from the5D0,1excitation states are affected
by the localized plasmon resonance to different extents, which are
dependent on both the dipole transition nature and the intrinsic quantum
yield of the emission line. Based on the plasmon-enabled tunable LIR,
high-level anticounterfeiting and optical temperature measurements
for photothermal conversion are further demonstrated. Our architecture
design and PL emission tuning results offer many possibilities for
constructing multifunctional optical materials by integrating plasmonic
and luminescent building blocks into hybrid nanostructures with different
configurations.