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    题名: Two Pyrophosphates with Large Birefringences and Second-Harmonic Responses as Ultraviolet Nonlinear Optical Materials
    作者: Lu, Xuefang;Chen, Zhaohui;Shi, Xuerui;Jing, Qun;Lee, Ming-Hsien
    关键词: [PbPO]∞ layers;birefringence;phase-matchable;pyrophosphates;SHG responses
    日期: 2020-09-28
    上传时间: 2021-05-07 12:10:24 (UTC+8)
    摘要: Two new pyrophosphates nonlinear optical (NLO) materials, Rb3PbBi(P2O7)2 (I) and Cs3PbBi(P2O7)2 (II), were successfully designed and synthesized. Both compounds exhibit large NLO effects and birefringences. Material I presents the scarce case of possessing the coexistence of large birefringence (0.031 at 1064 nm and 0.037 at 532 nm) and second harmonic generation (SHG) response (2.8× potassium dihydrogen phosphate (KDP)) in ultraviolet NLO phosphates and its SHG is the largest in the phase‐matching (PM) pyrophosphates. Both I and II have three‐dimensional (3D) crystal structures composed of corner‐shared RbO12 (CsO11), RbO10 (CsO10), BiO6, PbO7 (PbO6) and P2O7 groups, in which P2O7 and PbO7 (PbO6) units form an alveolate [PbPO]∞ skeleton frame. Theoretical calculations reveal that the P−O, Bi−O and Pb−O units are mainly responsible for the moderate birefringence and large SHG efficiency of I.
    關聯: Angewandte Chemie International Edition 59(40), p.17648 -17656
    DOI: 10.1002/anie.202007494
    显示于类别:[物理學系暨研究所] 期刊論文

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