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

NSF资助ECS-8501433的更新提案是为了研究新的 受激准分子和反斯托克斯拉曼激光系统主要在真空紫外和 电磁波谱的极紫外区。 拟议研究 将利用两种不同的互补的独特功能， 电子束和激光等离子体激发方法 近年来，在莱斯大学。 一类新的 最近预测了离子型碱金属卤化物准分子， 被PI发现 它们的光谱学和机制 将对其生产过程进行调查。 可能的激励 方案包括Penning电离过程到第二电离 与电子束产生的亚稳氦碰撞产生的电势 和氖原子。 这些高激发态的光激发 通过准分子激光从固体表面烧蚀分子， 还将研究碱蒸气的软X射线激发。 这是 一种新颖的方法，因为这种激励技术迄今为止仅 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澄清其动力学 行为 此外，还提出了用于已知激光器的新的泵浦方案， 随着基于新光谱的新型激光源的发展， 信息将被调查。 一个这样的方案将利用 采用玻璃锥（轴棱锥）的新型光激发技术， 以光学泵浦稀有气体准分子。 这可能导致 简单的毫瓦平均功率可调谐真空紫外光源。 其他拟议 方案包括稀有气体受激准分子中的反斯托克斯拉曼激光器， 原子氧和准亚稳态的碰撞激发 碱金属原子的四重态。

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.