Selective enhancement of green upconversion luminescence of Er–Yb: NaYF4 by surface plasmon resonance of W18O49 nanoflowers and applications in temperature sensing

Selective enhancement of green upconversion luminescence of Er–Yb: NaYF₄ by surface plasmon resonance of W₁₈O₄₉ nanoflowers and applications in temperature sensing

Li Ang^{1, 2, 3}, Wu Jin-Lei^{2, 3}, Xu Xue-Song^{1, 2}, Liu Yang³, Bao Ya-Nan^{2, 3}, Dong Bin^{3, †}

(color online) (a) The UC emission spectra of Er–Yb: NaYF₄/W₁₈O₄₉ nanoflowers particles and Er–Yb: NaYF₄ nanoparticles under 976 nm LD excitation. (b) Plot of logarithmic green UC emission intensity versus logarithmic excitation power of pump laser for Er–Yb: NaYF₄/W₁₈O₄₉ nanoflowers particles.