A_(7)M^(Ⅱ)RE_(2)(B_(5)O_(10))_(3)系列紫外非线性光学晶体的研究进展  

Development of A_(7)M^(Ⅱ)RE_(2)(B_(5)O_(10))_(3)Series Ultraviolet Nonlinear Optical Crystals

作　　者：何楠 公丕富 林哲帅[1] HE Nan;GONG Pifu;LIN Zheshuai(Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100039,China)

机构地区：[1]中国科学院理化技术研究所,北京100190 [2]中国科学院大学,北京100039

出　　处：《人工晶体学报》2022年第9期1598-1607,共10页Journal of Synthetic Crystals

基　　金：国家自然科学基金重点项目(22133004);中科院稀土研究院重点部署项目(ZDRW-CN-2021-3)。

摘　　要：稀土硼酸盐非线性光学(NLO)材料由于其在激光技术领域的重要应用而备受关注,这主要是因为三价稀土离子如Y^(3+)、Sc^(3+)、Lu^(3+)等可以有效抑制d-d和f-f电子跃迁从而扩宽化合物的透过范围,同时稀土原子与氧原子结合成畸变的多面体可增强材料的非线性光学效应。A_(7)M^(Ⅱ)RE_(2)(B_(5)O_(10))_(3)系列(RE为稀土金属,A为碱金属、M为二价金属)化合物是稀土硼酸盐中一类重要的材料,其A、M以及RE位点具备灵活的占据方式,近年来得到了广泛关注。通过化学元素取代法,研究者们对该类化合物的种类进行拓展,目前已经合成出数十种属于该体系的化合物。这些化合物的截止边大多处在紫外甚至是波长小于200 nm的深紫外波段,非线性光学效应为0.4~2.1倍KDP,在紫外以及深紫外波段非线性光学领域中展现出了应用潜力。本文对其研究现状进行了总结,分析了其微观结构与光学性能之间的关系,并指出不同位点组分对材料非线性光学性能的影响,以期对此类化合物今后的发展提供参考。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(RE^(3+)),such as Y^(3+),Sc^(3+),and Lu^(3+),usually have wide ultraviolet transmission range since their d-d and f-f electronic transitions are effectively suppressed.Meanwhile,the distorted[REO_(n)]polyhedra can significantly enhance the NLO effect.A_(7)M^(Ⅱ)RE_(2)(B_(5)O_(10))_(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 A_(7)M^(Ⅱ)RE_(2)(B_(5)O_(10))_(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 A_(7)M^(Ⅱ)RE_(2)(B_(5)O_(10))_(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.

关 键 词：稀土硼酸盐 A_(7)M^(Ⅱ)RE_(2)(B_(5)O_(10))_(3) 紫外/深紫外非线性光学晶体 光学性能 

分 类 号：O734[理学—晶体学]