SBIR Phase II: Novel Crystal Growth Process for Silver Gallium Sulfide (AgGaS2)

SBIR 第二阶段：硫化银镓 (AgGaS2) 的新型晶体生长工艺

• 批准号: 9801383
• 负责人: Warren Ruderman
• 金额: $ 39.94万
• 依托单位: INRAD, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9801383&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Novel; Crystal

*** 9801383 Ruderman This Small Business Innovation Research Phase 11 Project a new approach to the growth of single crystals of silver gallium sulfide (AgGaS2 or AGS) - a unique material for nonlinear optical applications. An AGS optical parametric oscillator that can be pumped by a 1.06 um Nd:YAG laser can provide radiation continuously tunable from 2.5 to 10 um. All present crystal growth methods for AGS use directional crystallization from a congruent melt, that produce as-grown crystals containing second phase inclusions that have to be annealed to improve their optical quality. This technology produces material of variable composition, yield, and quality, involves high cost and yields crystals of limited size, all of which limit potential applications of AGS. In our Phase I research and in a subsequent INRAD funded bridge program, we have established the feasibility of AGS crystal growth by Czochralski and Top Seeded Solution Growth (TSSG) Encapsulated by a Rotating Seal. In Phase II we propose to further develop these two new crystal growth processes. High quality AGS crystals of large size, high quality and lower cost will make possible efficient laser sources continuously tunable from 2.5 to 10 um. Such sources will have numerous commercial applications in environmental monitoring for contaminants in air, spectroscopy research, Microelectronics manufacturing and high resolution infrared spectrometers. ***

*** 9801383鲁德曼这个小企业创新研究第11阶段项目的一种新的方法来生长单晶的银硫化镓（AgGaS 2或AGS）-一种独特的材料非线性光学应用。 用1.06 μ m Nd：YAG激光器泵浦的AGS光参量振荡器可提供2.5 ~ 10 μ m的连续可调谐辐射。 所有目前的AGS晶体生长方法都使用从全等熔体定向结晶，其产生含有第二相夹杂物的生长晶体，所述第二相夹杂物必须被退火以改善其光学质量。 该技术生产的材料的组成、产量和质量可变，涉及高成本和产生有限尺寸的晶体，所有这些都限制了AGS的潜在应用。 在我们的第一阶段研究和随后的INRAD资助的桥梁计划中，我们已经确定了通过直拉法和顶部籽晶溶液生长（TSSG）的可行性。 在第二阶段，我们建议进一步开发这两种新的晶体生长工艺。 大尺寸、高质量和低成本的高质量AGS晶体将使2.5 - 10 μ m连续可调谐的高效激光源成为可能。这种光源将在空气污染物的环境监测、光谱研究、微电子制造和高分辨率红外光谱仪中具有许多商业应用。 ***