Czochralski Crystal Growth Process for Organic Nonlinear Crystals

有机非线性晶体的直拉晶体生长工艺

• 批准号: 9361815
• 负责人: Warren Ruderman
• 金额: $ 6.49万
• 依托单位: INRAD, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9361815&HistoricalAwards=false
• 关键词: Czochralski; Crystal; Growth; Process; Organic

9361815 Ruderman Although several organic nonlinear single crystals have been reported to have exceptionally high figures of merit compared with the best inorganic crystals available, organic nonlinear crystals are not now being used in industrial, scientific or defense and aerospace laser systems. We attribute this principally to the lack of a supply of high quality single crystals of a large enough size to be useful. The technology for the growth, fabrication and polishing of organic nonlinear crystals is no now available. The crystal growth techniques reported in the literature for organic nonlinear crystals have been solution and Bridgman and crystal sizes for complex compounds have been of the order of a few mm or less. We propose to develop a Czochralski crystal growth process capable of producing large (2 to 3 cm) crystals of high perfection, to develop methods for fabricating and polishing such crystals and to characterize them with respect to crystal perfection, optical absorption coefficients, laser damage, frequency conversion efficiency and electro-optic properties. MMONS (3-Methyl-4-Methoxy-4'-nitrostilbene) which has been reported to have one of the largest nonlinear figures of merit, will be used as a model crystal and all work will be carried out with this crystal. However, the growth process as well as fabrication techniques that are developed will be applicable to a wide range of organic nonlinear crystals. ***

小行星9361815 尽管有报道称，与现有的最好的无机晶体相比，几种有机非线性单晶具有非常高的品质因数，但有机非线性晶体目前还没有用于工业、科学或国防和航空航天激光系统。 我们认为这主要是由于缺乏足够大尺寸的高质量单晶的供应。 有机非线性晶体的生长、制备和抛光技术目前还不成熟。 文献中报道的有机非线性晶体的晶体生长技术是溶液法和布里奇曼法，复杂化合物的晶体尺寸为几mm或更小。（2至3厘米）高度完美的晶体，开发制造和抛光这种晶体的方法，并在晶体完整性、光吸收系数、激光损伤频率转换效率和电光特性。 MMONS（3-甲基-4-甲氧基-4 '-硝基芪）被报道具有最大的非线性品质因数之一，将被用作模型晶体，并且所有工作都将使用该晶体进行。 然而，生长过程以及开发的制造技术将适用于广泛的有机非线性晶体。 ***