POWRE: Investigation of Laser-Target Interactions in Pulsed Laser Deposition Using a Picosecond, Tunable Free Electron Laser

POWRE：使用皮秒可调谐自由电子激光器研究脉冲激光沉积中的激光-目标相互作用

• 批准号: 9973697
• 负责人: Anne Reilly
• 金额: $ 6.96万
• 依托单位: College of William and Mary
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-15 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9973697&HistoricalAwards=false
• 关键词: POWRE; Investigation; Laser; Target; Interactions

The goal of this project is to investigate laser-target interaction during pulsed laser ablation using a high average power, tunable, fast repetition rate, picosecond-pulse duration free electron laser (FEL). The study is expected to lay the groundwork for determining laser parameters for optimization of film properties with the ultimate research goal of producing high quality thin films and multilayers, specifically of magnetic and metallic materials. The starting point in understanding the deposition of thin films is understanding the laser-target interaction and the generation of the ablated material plume. Three materials will be studied: a magnetic material (Co), a noble metal (Ag), and a dielectric (LiNbO3). The laser source will be Thomas Jefferson National Accelerator Facility Free Electron Laser. The laser-target interaction will be studied in-situ by ultrafast pump-probe optical microscopy, spectral analysis of the ablated plasma, pump-probe reflectivity and ex-situ using surface characterization techniques.%%% This is a research enhancement grant made under the Professional Opportunities for Women in Research and Education (POWRE) program. The research will contribute basic materials science knowledge relevant to the deposition of thin films and multilayers of magnetic and metallic materials. The project also places emphasis on the integration of research and education by incorporating graduate student participation into research and the results of research into classroom activities in a university setting. The project is co-supported by the Division of Materials Research, and the MPS OMA(Office of Multidisciplinary Activities). ***

本计画的目的是利用高平均功率、可调、快重复频率、皮秒脉冲宽度的自由电子激光器（FEL）研究脉冲激光烧蚀过程中激光与靶材的相互作用。该研究预计将为确定激光参数优化薄膜性能奠定基础，最终研究目标是生产高质量的薄膜和多层膜，特别是磁性和金属材料。理解薄膜沉积的出发点是理解激光-靶相互作用和烧蚀材料羽流的产生。将研究三种材料：磁性材料（Co）、贵金属（Ag）和电介质（LiNbO 3）。激光源将是托马斯杰斐逊国家加速器设施自由电子激光器。激光-靶相互作用将通过超快泵浦-探测光学显微镜、烧蚀等离子体的光谱分析、泵浦-探测反射率和使用表面表征技术的非原位进行原位研究。这是根据研究和教育领域妇女专业机会方案提供的一项研究增强补助金。这项研究将有助于与磁性和金属材料的薄膜和多层沉积相关的基础材料科学知识。该项目还强调研究与教育的一体化，将研究生参与纳入研究，并将研究成果纳入大学环境中的课堂活动。该项目由材料研究部和MPS OMA（多学科活动办公室）共同支持。***