中文摘要：

利用脉冲激光沉积（PLD）设备在蓝宝石衬底上制备了高质量Zn（1-x）MgxO单晶薄膜,并对其结构和光学特性进行了深入细致的研究。通过能量衍射谱（EDS）确认Zn（1-x）MgxO薄膜的Mg组分为45%。在Zn0.55Mg0.45O薄膜的X射线衍射谱（XRD）中观测到了明显的位于36.67°的衍射峰,对应的是（111）晶向的立方相ZnMgO。从透射光谱中可以看出,Zn0.55Mg0.45O具有陡峭的吸收边,没有发生相分离,在透射电镜图谱中也得到了证实。该ZnMgO薄膜还表现出了优异的光学特性,在Zn0.55Mg0.45O材料体系中实现了峰位位于310 nm的紫外光泵浦受激发射,其激光发射的阈值仅为22 k W/cm2。

英文摘要：

The optical and structural properties of high-quality epitaxial Zn（1-x）MgxO films deposited by pulsed-laser deposition（PLD） were studied. Zn（1-x）MgxO films with - 45% Mg incorporation were measured by EDS（Energy dispersive spectroscopy）. XRD（X-ray diffraction） measurement results show that Zn0. 55Mg0. 45 O films have a cubic phase structure without phase separation and are epitaxial grown along the c-axis of Al2O3 substrate. In the films,intense UVB optical pumped stimulated emission of this pure cubic-phase ZnMgO can be observed. The lasing threshold is about 22 k W/cm^2. Lasing occurs at UVB wavelength of - 310 nm under optical pumping.