论文部分内容阅读
采用提拉法生长了Cr单掺和Cr,Mg共掺Al2O3晶体,后者具有900—1600nm的宽带吸收.研究了该吸收带在不同气氛、不同温度退火下的变化规律.通过建立合理的晶格缺陷模型,成功地解释了所有的实验结果,并确定Cr,Mg共掺Al2O3晶体红外波段宽吸收带属于八面体格位中的Cr4+离子.
The Cr single-doped and Cr-Mg codoped Al 2 O 3 crystals were grown by Czochralski method, the latter with broad band absorption of 900-1600 nm.The variation of the absorption band under different atmospheres and different temperature annealing was studied.By establishing reasonable crystal The lattice defect model successfully explained all the experimental results and determined that the band of the infrared absorption band of Cr and Mg co-doped Al2O3 crystals belongs to the Cr4 + ion in the octahedral lattice.