科研之友
微信
新浪微博
Facebook
分享链接
摘要
Rare earth nonlinear optical (NLO) borates have attracted much attention due to their important applications in the field of laser technology. It is known that the trivalent rare earth ions (RE3+), such as Y3+, Sc3+, and Lu3+, usually have wide ultraviolet transmission range since their d-d and f-f electronic transitions are effectively suppressed. Meanwhile, the distorted [REOn] polyhedra can significantly enhance the NLO effect. A7MIIRE2(B5O10)3 series (RE=rare earth, A=alkaline metal, M=divalent metal) are an important family of rare earth borates, in which A, M and RE sites can be flexibly occupied. Till now, dozens of A7MIIRE2(B5O10)3 compounds have been synthesized through chemical element substitution. Most of their transmission cut-off edges are located in the ultraviolet band, even in the deep ultraviolet band down to 200 nm, and their NLO effects are 0.4~2.1 times of KDP, showing its potential as promising NLO materials in ultraviolet/deep ultraviolet region. This article summarizes the recent progress of A7MIIRE2(B5O10)3 family by investigating the relationship between their microstructure and optical properties, from which the effects of different atomic sites on NLO properties are pointed out. This work would be beneficial to the future development of rare earth NLO borates.
- 单位
