Optical Spectroscopy and Control of Complex Materials

复杂材料的光谱学和控制

• 批准号: 0212375
• 负责人: Keith Nelson
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0212375&HistoricalAwards=false
• 关键词: Optical; Spectroscopy; Control; Complex; Materials

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division and the Solid State Chemistry Program of the Division of Materials Research, Nelson will conduct research in time resolved optical spectroscopy and coherent optical control of condensed matter systems. The complex dynamics of disordered and partially disordered materials will be studied over time scales ranging from femtoseconds to milliseconds. Supercooled glass-forming liquids and ferroelectric crystals, both of which exhibit complex dynamical behavior that changes sharply as a function of temperature, will be investigated. Novel methods for far-infrared, or terahertz (THz) frequency spectroscopy, as well as automated methods for spatiotemporal femtosecond pulse shaping will be exploited for generating intense, focused THz beams with field levels exceeding 2 MV/cm. This research is concerned with the complex dynamical behavior of condensed matter, mainly solids, ferroelectric media and supercooled liquids. Novel high frequency infrared methods, including terahertz echoes will be developed. The work has the potential of leading to practical devices. Students and postdoctoral research associates participate in this research. Nelson will also conduct an ambitious outreach program to bring research experiences in physical chemistry/chemical physics to secondary school students

在该项目中，尼尔森将在材料研究司的实验物理化学计划和固态化学计划的实验化学计划中资助，尼尔森将在时间上进行研究研究，对凝结物质系统的光谱和相干的光学控制。 随着时间的尺度，将研究无序和部分无序材料的复杂动力学，从飞秒到毫秒。 将研究超冷的玻璃形成液体和铁电晶体，两者都表现出复杂的动力学行为，随着温度的函数急剧变化。 远红外或Terahertz（THZ）频谱的新方法，以及时空飞秒脉冲成型的自动化方法，用于产生强烈的，聚焦的THZ梁，其场水平超过2 mV/cm。这项研究涉及冷凝物质的复杂动力学行为，主要是固体，铁电培养基和超冷液体。 将开发新的高频红外方法，包括Terahertz Echoes。 这项工作有可能导致实用设备。 学生和博士后研究协会参与了这项研究。 尼尔森还将进行雄心勃勃的外展计划，以将物理化学/化学物理学的研究经验带到中学生