REU Supplement: Spectroscopic and Kinetic Studies of New New Excimer and Anti-Stokes Raman Lasers

REU 增刊：新型准分子和反斯托克斯拉曼激光器的光谱和动力学研究

• 批准号: 8719618
• 负责人: Roland Sauerbrey
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-15 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8719618&HistoricalAwards=false
• 关键词: REU; Supplement; Spectroscopic; Kinetic; Studies

This renewal proposal of NSF grant ECS-8501433 is for the study of new excimer and anti-Stokes Raman laser systems primarily in the VUV and XUV regions of the electromagnetic spectrum. The proposed research will utilize the unique capabilities of two different complimentary approaches of electron beam and laser-produced plasma excitation developed during recent years at Rice University. A new class of molecules, the ionic alkali halide excimer, was recently predicted and discovered by the PI. Their spectroscopy as well as mechanisms leading to their production will be investigated. Possible excitation schemes include Penning ionization processes to a second ionization potential via collision with electron-beam-produced metastable helium and neon atoms. Optical excitation of these highly-excited states through excimer laser ablation of molecules from solid surfaces and soft x-ray excitation of alkali vapors will also be studied. This is a novel approach since this excitation technique has thus far only been applied to atomic systems. A search for new triatomic rare gas halide excimers will also be carried out to clarify their kinetic behavior. In addition, new pumping schemes for known lasers as well as the development of novel laser sources based on new spectroscopic information will be investigated. One such scheme will utilize a novel optical excitation technique employing glass cones (axicons) in order to optically pump the rare gas excimers. This could result in simple milliwatt average power tunable VUV sources. Other proposed schemes include anti-Stokes Raman lasers in the rare gas excimer, atomic oxygen, and the collisional excitation of quasi-metastable quartet states of the alkali atoms.

NSF拨款ec -8501433的更新提案主要用于研究电磁波谱的VUV和XUV区域的新型准分子和反斯托克斯拉曼激光系统。拟议的研究将利用两种不同的互补方法的独特能力，电子束和激光产生的等离子体激发近年来在莱斯大学发展起来。最近，PI预测并发现了一类新的分子——离子碱卤化物准分子。它们的光谱学以及导致它们产生的机制将被研究。可能的激发方案包括Penning电离过程，通过与电子束产生的亚稳氦和氖原子碰撞达到第二电离势。这些高激发态的光激发，通过准分子激光烧蚀分子从固体表面和软x射线激发碱蒸气也将进行研究。这是一种新颖的方法，因为这种激发技术迄今为止只应用于原子系统。寻找新的三原子稀有气体卤化物准分子也将进行，以澄清其动力学行为。此外，还将研究已知激光器的新泵浦方案以及基于新的光谱信息的新型激光源的开发。一个这样的方案将利用一种新的光激发技术，采用玻璃锥（轴像），以光泵稀有气体准分子。这可能导致简单的毫瓦平均功率可调VUV源。其他提出的方案包括稀有气体准分子、氧原子中的反斯托克斯拉曼激光器，以及碱原子准亚稳态四重奏态的碰撞激发。