Rb2CdBr2I2: A New IR Nonlinear Optical Material with a Large Laser Damage Threshold

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• 作者：Qi Wu ; Xianggao Meng ; Cheng Zhong ; Xingguo Chen ; Jingui Qin
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：April 16, 2014
• 年：2014
• 卷：136
• 期：15
• 页码：5683-5686
• 全文大小：261K
• 年卷期：v.136,no.15(April 16, 2014)
• ISSN：1520-5126

文摘

This paper describes the synthesis, crystal structure, and photophysical properties of a new compound Rb₂CdBr₂I₂. It crystallizes in the noncentrosymmetric space group Ama2. In the crystal, all the distorted tetrahedron [CdBr₂I₂]^{2鈥?/sup> groups are arranged in a way such that all the Cd鈥揑 bonds are located in the same side of the Cd atoms resulting in a net polarization. Rb₂CdBr₂I₂ showed a powder second harmonic generation (SHG) response 4 times that of KH₂PO₄ (KDP). The preliminary measurement indicated that it exhibits a large laser-induced damage threshold (LDT) of 190 MW/cm2 which is 6 times that of AgGaS₂. It also exhibits a wide transparent region (0.37鈥?4 渭m) with a relatively high (up to 490 掳C) thermal stability. All these indicate that Rb₂CdBr₂I₂ is a new promising candidate for NLO materials in the IR region.}