Purchase of a Tunable-Wavelength Amplified Femtosecond Laser for Transient Spectroscopy and Microfabrication

购买用于瞬态光谱和微加工的可调谐波长放大飞秒激光器

• 批准号: 0741804
• 负责人: Harold Martinson
• 金额: $ 49.98万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-02-01 至 2012-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0741804&HistoricalAwards=false
• 关键词: Purchase; Tunable; Wavelength; Amplified; Femtosecond

AbstractWith support from the Chemistry Research Instrumentation and Facilities - Multiuser Instrumentation (CRIF-MU) Program, the Department of Chemistry & Biochemistry at the University of California Los Angeles will purchase a tunable-wavelength amplified femtosecond laser. This equipment will enhance research in a number of areas in transient spectroscopy and microfabrication including: 1) measurement of the rotational motions of molecular compasses and gyroscopes, and investigation of the possible development of a "photonic brake", 2) development of direct two-photon, three-dimensional microfabrication of ceramic metal oxides using novel photosensitive sol-gel-based photoresists, 3) fundamental investigations of chemical bond dynamics in solution using two- and three pulse femtosecond transient absorption and fluorescence spectroscopies, and 4) understanding how controlling the conformation of semiconducting polymer chains via encapsulation in mesoporous silica leads to new electronic properties.A femtosecond laser provides ultrafast pulses with high peak power via coherent visible or infrared light, which enables researchers to study nonlinear processes and obtain important information about fast occurring chemical reactions. Its use may enable breakthroughs in our understanding of the properties of reactive and nonreactive molecules.

摘要在化学研究仪器和设施-多用户仪器（CRIF-MU）计划的支持下，加州洛杉矶大学化学生物化学系将购买一台可调谐波长放大飞秒激光器。 该设备将加强瞬态光谱学和微加工领域的研究，包括：1）测量分子罗盘和陀螺仪的旋转运动，并研究“光子制动器”的可能发展，2）使用新型光敏溶胶-凝胶基光致抗蚀剂发展陶瓷金属氧化物的直接双光子三维微制造，3）使用两脉冲和三脉冲飞秒瞬态吸收和荧光光谱对溶液中的化学键动力学进行基础研究，和4）了解如何通过在介孔二氧化硅中的封装来控制半导体聚合物链的构象，从而导致新的电子性质。飞秒激光提供具有高峰的超快脉冲通过相干可见光或红外光提供能量，使研究人员能够研究非线性过程，并获得有关快速发生的化学反应的重要信息。它的使用可能使我们对反应性和非反应性分子性质的理解取得突破。