结合第二阶段的Jahn-Teller扭曲离子来创建高效的SHG材料: BaTeM2O9 (M = Mo6+或W6+) 的合成,表征和NLO特性
Hyun-Seup Ra1, Kang Min Ok, P Shiv Halasyamani
1Department of Chemistry, Center for Materials Chemistry, University of Houston, 136 Fleming Building, Houston, TX 77204-5003, USA.
Journal of the American Chemical Society
|June 26, 2003
概括
两个新型氧化物,BaTeMo2O9和BaTeW2O9,由于阴离子扭曲,具有强大的第二和生成 (SHG) 特性. 这些材料具有相位匹配性,显示了非线性光学应用的潜力.
科学领域:
- 固态化学 固态化学
- 材料科学是一种材料科学.
- 非线性光学是一种非线性光学.
背景情况:
- 对于光学应用来说,第二和生成 (SHG) 是至关重要的.
- 了解晶体结构和SHG特性之间的关系是关键.
- 第二阶段的Jahn-Teller (SOJT) 扭曲可以诱导不对称性并增强SHG.
研究的目的:
- 合成和描述具有强大的SHG潜力的新氧化物材料.
- 调查SOJT扭曲在观察到的SHG反应中的作用.
- 确定新材料的相匹配性和有效非线性系数.
主要方法:
- 标准的固态合成技术.
- 粉末第二和生成 (SHG) 测量.
- 债券超极化值的计算. 债券超极化值的计算.
主要成果:
- 两种新的氧化物BaTeMo2O9和BaTeW2O9已成功合成.
- 这两种材料都表现出强烈的SHG强度,与LiNbO3.3相当.
- 通过实验有效非线性系数 (deffexp) 的28和22 pm/V的相匹配性质得到证实.
- 对BaTeMo2O9的计算deffcalc为20 pm/V,对Te-O和W-O债券的精细β值.
结论:
- 合成的BaTeMo2O9和BaTeW2O9氧化物具有显著的SHG特性.
- 这些材料中的SOJT扭曲会导致两极分化的纽带,从而建设性地增强SHG.
- 这些材料具有相位匹配性,表明它们适用于非线性光学设备.
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