MRI: Development of Resonant Cavity-Based UV and Mid-IR Remtosecond Laser Light for Direct and Pump-Probe Photoemission Spectroscopy

这项来自主要研究仪器计划的奖项支持科罗拉多大学的仪器开发。 基于谐振腔的和频和差频产生将用于在难以获得的紫外和中红外光谱范围内产生迄今为止最高强度的高重复率飞秒激光。激光的发展将有助于物理、化学和生物学的各种研究。 主要的科学动机是利用光为全新的技术，基于激光的角分辨光电子能谱（ARPES）和泵浦探测激光为基础的ARPES的电子动力学研究。其中要解决的问题是高温超导体（HTSC）和巨大的磁阻（CMR）氧化物的物理，以及在表面反应和desorption.This从主要研究仪器计划支持仪器开发在科罗拉多大学的奖项激发态动力学的化学。该大学的研究人员将开发新的能力，在难以获得的紫外和中红外光谱范围内以高重复率（每秒约1亿个脉冲）产生迄今为止最高强度的超短激光脉冲（飞秒时间尺度）。激光的发展应该对物理学、化学和生物学的各种研究有用。 高功率激光将用于进行光电子能谱，这是一种研究各种材料中电子的量子力学能量和运动的技术。其中要解决的问题是高转变温度超导体（HTSC）和巨磁阻（CMR）氧化物的物理学，以及在表面发生的化学反应的性质。

This award from the Major Research Instrumentation program supports instrument development at the University of Colorado. Resonant-cavity-based sum and difference frequency generation will be used to produce the highest intensity to date of high repetition-rate femtosecond laser light in the difficult-to-obtain UV and mid-IR spectral regimes. The laser developments will be useful for a diverse set of studies in physics, chemistry, and biology. The principal scientific motivation is to utilize the light for the brand new techniques of laser-based angle-resolved photoemission spectroscopy (ARPES) and pump-probe laser based ARPES for the study of electron dynamics. Among the problems to be addressed are the physics of high temperature superconductors (HTSC) and colossal magnetoresistive (CMR) oxides, as well as the chemistry of excited state dynamics in surface reactions and desorption.This award from the Major Research Instrumentation program supports instrument development at the University of Colorado. Researchers at the University of will develop new capability to generate the highest intensity to date of very short laser pulses (femtosecond time scale) at a high repetition-rate (~100 million pulses per second) in the difficult-to-obtain ultravioler and mid-infrared spectral regimes. The laser developments should be useful for a diverse set of studies in physics, chemistry, and biology. The high power laser lights willbe used to perform photoelectron spectroscopy, which is a technique to study the quantum mechanical energies and motions of electrons in various materials. Among the problems to be addressed are the physics of high transition temperature superconductors (HTSC) and colossal magnetoresistive (CMR) oxides, as well as the nature of chemical reactions which occur at surfaces.