Abstract
Exploration of plasmonic structures to enhance upconversion
luminescence (UCL) attracts attention because faint UCL from a
material is a bottleneck for its applications. We designed and
prepared three easily realized structures to improve the UCL of β-NaYF4:Yb3, Er3+ micropillar (MP), and compared them
to a reference structure on glass on single particles. We achieved a
43-fold UCL enhancement with the MPs with an Ag cap.The experimental
results and simulations indicated that the improvements in excitation
field and radiation direction collectively enhanced the MP UCL. We
validated the captured radiation patterns generated from various
structures by excitation simulations and provide a rational criterion
for cavity design.
Funder
National Natural Science Foundation of
China
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials