Optical Nonlinearity in Cu2CdSnS4 and 伪/尾-Cu2ZnSiS4: Diamond-like Semiconductors with High Laser-Damage Thresholds

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• 作者：Kimberly A. Rosmus ; Jacilynn A. Brant ; Stephen D. Wisneski ; Daniel J. Clark ; Yong Soo Kim ; Joon I. Jang ; Carl D. Brunetta ; Jian-Han Zhang ; Matthew N. Srnec ; Jennifer A. Aitken
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：August 4, 2014
• 年：2014
• 卷：53
• 期：15
• 页码：7809-7811
• 全文大小：240K
• ISSN：1520-510X

文摘

Cu₂CdSnS₄ and 伪/尾-Cu₂ZnSiS₄ meet several criteria for promising nonlinear optical materials for use in the infrared (IR) region. Both are air-stable, crystallize in noncentrosymmetric space groups, and possess high thermal stabilities. Cu₂CdSnS₄ and 伪/尾-Cu₂ZnSiS₄ display wide ranges of optical transparency, 1.4鈥?5 and 0.7鈥?5 渭m, respectively, and have relatively large second-order nonlinearity as well as phase matchability for wide regions in the IR. The laser-damage threshold (LDT) for Cu₂CdSnS₄ is 0.2 GW/cm², whereas 伪/尾-Cu₂ZnSiS₄ has a LDT of 2.0 GW/cm² for picosecond near-IR excitation. Both compounds also exhibit efficient third-order nonlinearity. Electronic structure calculations provide insight into the variation in properties.