【摘要】 将注量为5×1016/cm2和能量为150～390keV的Cu+离子,在不同温度下注入αAl2O3单晶试样,并在还原气氛中进行不同温度下的热退火处理,然后对试样进行光吸收和荧光测量.测试结果表明,不同能量及不同温度条件下的Cu+离子注入不同晶向的αAl2O3晶体后,均发现该晶体在紫外可见光区域发生强吸收,而经退火后吸收强度大幅度下降.通过对光吸收谱进行高斯拟合以及荧光谱分析确认,Cu+离子注入蓝宝石晶体产生的点缺陷主要为F心,F+心,F2+心和F2+2等阴离子空位缺陷.更多还原

【Abstract】 Specimens of α-Al2O3 crystals with different orientations were implanted by Cu+ with a dose of 5×10(16) ions/cm2 and energy ranging from 150 to 390keV at different temperature, then annealed in Ar+ atmosphere at different temperature. Optical absorption and luminescence analyses for these specimens were studied. The results show that there is a strong absorption at ultraviolet-visible light area for all of the specimens and its intensity decreases after annealing. The absorption curves have been evaluated by Gaussian fitting, which been confirmed by luminescence measurements. It is found that there were point defects, such as F, F+, F2+ and F2(2+)-type center in the Cu+ ion implanted sapphire crystals.更多还原