Research on Novel Short-Wavelength, Short Pulse Laser Systems

在过去的三年里，我们的国家科学基金会资助的项目 在以下领域取得了一些重大成果： 短波长激光光谱，激光 材料和激光等离子体相互作用。 为 我们第一次使用内壳层光电离， 产生新的准分子样分子 states. 结果表明，激光产生的 等离子体激发技术也可用于 促进新的化学反应形成分子 离子。 这些结果将对 未来分子短波长方案 激光，等离子体化学，内光谱 壳层激发的分子，甚至理解 密集的分子云 类星体 我们节目的另一个亮点是 激光中高强度现象研究 材料的相互作用和生产的子100 直接紫外激光制备纳米线聚合物 消融术 未来三年的计划 聚焦三个新理念。 现在时机已经成熟 进行光致电离实验 泵浦离子准分子激光器 在这个项目中，我们将 将光致电离的进展 原子短波长激光器泵浦 由一位研究者开创。 第二 该项目将侧重于调查的可能性， 新型紫外和真空紫外准分子类固体激光器。 目标是将效率和性能联合收割机 可调性，如果准分子与紧凑性和 相对简单的固态激光器。 最后我们 将探索一种新的思路， 在一个我们称之为 disomer（或disoplex）激光方案。 等 放大器将是通用的所有解离 分子状态， 带宽的脉冲放大在10 fs范围。

Over the last three years, our NSF funded program let to a number of significant results in the areas of short wavelength laser spectroscopy, laser materials, and laser plasma interaction. For the first time we used inner shell photoionization of molecules to generate new, excimer like molecular states. It was demonstrated that the laser produced plasma excitation technique can also be used to promote new chemical reactions to form molecular ions. These results will have decisive impact on future schemes of molecular short wavelength lasers, plasma chemistry, the spectroscopy of inner shell excited molecules, and even the understanding of dense molecular clouds in the neighborhood of quasars. Another highlight of our program was the investigation of high intensity phenomena in laser- materials interaction and the production of sub-100 nm lines polymers by direct ultraviolet laser ablation. The proposed program for the next three years focuses on three new ideas. The time is now ripe to undertake experiments towards photoionization pumped ionic excimer lasers. In this project we will bring together the progress on photoionization pumping of atomic short wavelength lasers pioneered by one of the investigators. The second project will focus on investigating the possibility for new UV and VUV excimer like solid state lasers. The objective is to combine the efficiency and tunability if excimers with the compactness and relative simplicity of solid state lasers. Finally, we will explore a new idea to produce gain in dissociating molecules in a proposal we call the disomer (or disoplex) laser scheme. Such amplifiers would be universal for all dissociating molecular states and would have unsurpassed bandwidth for the amplification of pulses in the 10 fs range.