强大的克莱曼禁止的二次波生成在化硫化物中:La4InSbS9
Hua-Jun Zhao1, Yong-Fan Zhang, Ling Chen
1Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
Journal of the American Chemical Society
|January 14, 2012
概括
研究人员合成了一种新的合硫化物家族,Ln(4)InSbS(9),表现出异常的第二波生成 (SHG). 化合物显示了迄今为止观察到的最强的克莱曼禁止SHG,这表明了先进光学材料的潜力.
科学领域:
- 固态化学和材料科学 固态化学和材料科学
- 非线性光学和光子学
背景情况:
- 状材料对于先进的光学应用至关重要.
- 二次波生成 (SHG) 是一个关键的非线性光学现象.
- 开发具有强度和相位匹配的SHG的新材料是一个持续的挑战.
研究的目的:
- 为了合成和表征一种新型的化硫化物家族,Ln(4)InSbS(9).
- 研究这些新化合物的第二波生成 (SHG) 特性.
- 探索观察到的SHG效应的理论起源.
主要方法:
- 固态反应合成的Ln(4) InSbS(9) (Ln = La, Pr, Nd). 在固态反应中.
- 使用X射线衍射进行结构性表征 (空间组确定暗示).
- 实验测量第二波生成 (SHG) 强度和相匹配特性.
- 使用密度函数理论 (DFT) 和ab initio分子动力学的计算分析.
主要成果:
- 一个新的合硫化物家族,Ln(4)InSbS(9),具有独特的结构类型 (P4(1)2(1)2或P4(3)2(1)2) 被成功合成.
- (La) 成员展示了迄今为止报告的最强的克莱曼禁止的SHG效应,超过商业AgGaS(2) 的1.5倍在2.05μm.
- 该La化合物表现出与I型相匹配的SHG行为.
- 理论计算表明,格子振动在强烈的SHG效应中起作用.
结论:
- 发现Ln(4)InSbS(9) 扩大了奇拉非线性光学材料的库.
- 对于需要高效和相匹配的SHG的应用,La成员显示出显著的潜力.
- 格子动态被确定为影响SHG显著性能的一个关键因素.
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