Peng Guang, Yang Yi, Yan Tao, Zhao Dan, Li Bingxuan, Zhang Ge, Lin Zheshuai, Ye Ning
Key Laboratory of Optoelectronic Materials Chemistry and Physics , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . Email:
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China , Fuzhou , Fujian 350002 , China.
Chem Sci. 2020 Jun 23;11(28):7396-7400. doi: 10.1039/d0sc02789h. eCollection 2020 Jul 28.
The first trivalent rare-earth iodate fluoride nonlinear optical (NLO) crystal, Y(IO)F (YIF), was successfully designed and synthesized, featuring polarization-favorable helical chains constructed from -YOF polyhedra and IO groups. It exhibited a suitable balance of a wide transparency range of 0.26-10.0 μm, high laser damage threshold (LDT) of 39.6 × AgGaS, and moderate second harmonic generation (SHG) effect of 2 × KDP. A series of doped RE:YIF (RE = Pr, Nd, Dy, Ho, Er, Tm, and Yb) crystals were easily synthesized benefiting from the spring-shaped helix structure, which possess wide absorption and emission peaks as well as long lifetime, especially in the visible and near-infrared regions. Particularly, the remarkable fluorescence properties of Nd and Yb doped YIF crystals are comparable to and even better than those of traditional self-frequency doubling (SFD) crystals such as YAB, YCOB, and GdCOB. Thus, these RE-doped YIF crystals are promising laser SFD crystals. This work also indicated that constructing helical chains should be an effective strategy for the design of inorganic polar materials.
首个三价稀土碘酸氟化物非线性光学（NLO）晶体Y(IO)F（YIF）被成功设计并合成，其具有由-YOF多面体和IO基团构成的有利于极化的螺旋链。它在0.26 - 10.0μm的宽透明范围内、39.6×AgGaS的高激光损伤阈值（LDT）以及2×KDP的适度二次谐波产生（SHG）效应之间展现出了合适的平衡。受益于弹簧状螺旋结构，一系列掺杂的RE:YIF（RE = Pr、Nd、Dy、Ho、Er、Tm和Yb）晶体易于合成，这些晶体具有宽吸收和发射峰以及长寿命，特别是在可见光和近红外区域。尤其值得一提的是，Nd和Yb掺杂的YIF晶体的显著荧光特性与传统的自倍频（SFD）晶体如YAB、YCOB和GdCOB相当，甚至更优。因此，这些稀土掺杂的YIF晶体是很有前景的激光SFD晶体。这项工作还表明构建螺旋链应该是设计无机极性材料的一种有效策略。
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