Abstract
Zn1−x Mg x O crystals with nanostructures were grown on a-plane sapphire substrates by mist chemical vapor deposition (mist-CVD). The grown Zn1−x Mg x O crystals had a wurtzite crystalline, and their room-temperature photoluminescence peaks of them varied from approximately 355.5 to 377.9 nm depending on the composition of magnesium. Under high excitation conditions using a Nd:YAG pulse laser, random lasing behaviors were obtained from Zn1−x Mg x O crystals, and the tuning in the wavelength range of these random lasing was demonstrated. These results suggest that the mist-CVD crystal growth on a-plane sapphire substrates is useful for the growth of Zn1−x Mg x O crystals exhibiting random lasing.
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