论文部分内容阅读
The search of new second-harmonic-generation (SHG) materials is of current interest and great importance owing to their applications in photonic technologies.It is reported that systems contain a lone pair cation such as Se(Ⅵ),Te(Ⅴ) and Ⅰ(Ⅴ) are apt to form non-centrosymmetric structures (NCS) with good SHG properties.