Figure 5

PL spectra and corresponding emission mapping images. (a) Pure ZnSe, (b) ZnSe_Mn, (c), ${\mathrm{\text{ZnSe}}}_{{\mathrm{\text{MnCl}}}_2}$, and (d)${\mathrm{\text{ZnSe}}}_{{\mathrm{Mn}(\mathrm{CH}}_3\mathrm{\text{COO}})2}$ nanobelt, respectively. The insets are the corresponding bright-field optical and dark-field emission images. The red curve in (d) is the fitted PL spectrum. (e) The PL of each individual emission band in (c). (f) PL mapping images of individual emission sub-band in (d). The scale is 4 μm.