K2Na(IO3)2(I3O8) with Strong Second Harmonic Generation Response Activated by Two Types of Isolated Iodate Anions,Chemistry of Materials

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K2Na(IO3)2(I3O8) with Strong Second Harmonic Generation Response Activated by Two Types of Isolated Iodate Anions
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-04-02 , DOI: 10.1021/acs.chemmater.0c00878
Tushagu Abudouwufu ₁ , Min Zhang _{1,

2} , Shichao Cheng ₁ , Hao Zeng ₁ , Zhihua Yang _{1,

2} , Shilie Pan _{1,

2}

Affiliation

A new alkali metal iodate, K₂Na(IO₃)₂(I₃O₈), has been synthesized using the mild hydrothermal method, which is the first example of noncentrosymmetric iodate containing isolated [IO₃]⁻ and [I₃O₈]⁻ groups. To the best of our knowledge, it exhibits the largest second harmonic generation response among the iodates with two types of isolated I–O groups (7.6 × KH₂PO₄ (KDP) @1064 nm). It also possesses a moderate birefringence (Δn) of 0.055 at 1064 nm for achieving its phase matching and a wide band gap (3.83 eV) for obtaining a high laser damage threshold, which assures that it possesses a high laser-induced damage threshold (LDT, 13 × AgGaS₂). These results indicate that it is a good candidate for nonlinear optical applications.

中文翻译：

K ₂ Na（IO ₃）₂（I ₃ O ₈）具有强二次谐波生成响应，可通过两种类型的分离的碘化物阴离子激活

使用温和的水热法合成了一种新的碘酸碱金属盐K ₂ Na（IO ₃）₂（I ₃ O ₈），这是非中心对称碘酸盐的第一个实例，它包含分离的[IO ₃ ] ^-和[I ₃ O ₈ ] ^-组。据我们所知，它在具有两种隔离的I–O组（7.6×KH ₂ PO ₄（KDP）@ 1064 nm）的碘酸盐中表现出最大的二次谐波响应。它还具有适度的双折射（Δn）在1064 nm处为0.055）以实现其相位匹配，并在宽带隙（3.83 eV）下获得较高的激光损伤阈值，从而确保它具有较高的激光诱导损伤阈值（LDT，13×AgGaS ₂）。这些结果表明，它是非线性光学应用的理想选择。

更新日期：2020-04-02

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