Lasing from ZnO microcrystals regrown on (110)-oriented ZnO structure

The effect of intermediate catalysis with Ag on structural and near-band-edge-emission properties of ZnO was studied. It was found that the regrowth of ZnO on top of (110)-oriented ZnO structure coated with Ag results in the change of ZnO crystallographic characteristics and appearance of stimulated emission, which was observed under nanosecond photoexcitation. It was assumed that the excitation of lasing became possible due to formation of c-axis oriented ZnO crystals, which can serve as laser microcavities.