Surface Plasmon Resonance Enhanced Spontaneous Upconversion and Stimulated Emissions in Glass Ceramics Containing Ba₂LaF₇ Nanocrystals

Figure 4

(a) Emission spectra of 0.5 Ag sample under different pump intensity of 980 nm nanosecond lasers: the inset is the photograph of 0.5 Ag sample under excitation of 980 nm nanosecond. (b) Integrated emission intensity of 0 Ag and 0.5 Ag samples versus pumping energy density. (c) Plot of Fourier transform (FT) patterns of the lasing spectra of the 0.5 Ag sample.

(a)

(b)

(c)