Laser-Based Studies of Hyperquenched and Other Amorphous Films

超淬火薄膜和其他非晶薄膜的激光研究

• 批准号: 9307034
• 负责人: Gerald Small
• 金额: $ 27万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1997-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9307034&HistoricalAwards=false
• 关键词: Laser; Based; Studies; Hyperquenched; Other

9307034 Small This project combines laser-based techniques with a new, practical methodology for reproducible, well-defined fabrication of thin (tens of micrometers or less) hyperquenched glassy films. New, powerful experimental techniques such as spectral hole burning and coherent time domain spectroscopies will be used to develop an adequate understanding of the physics of amorphous solids. The research deals with various aspects of the disorder, low-energy excitations and low-temperature configurational relaxation (tunnelling) processes of amorphous solids. A select number of organic liquids and waater will be utilized in the experimental studies. The proposed investigation can be divided into three parts: 1) studies of disorder and relaxation phenomena in hyperquenched glassy and other amorphous solid films; 2) examination of temperature dependencies of thermal conductivity and spectral diffusion; and 3) the probing of special disorder-induced, low-frequency vibrational modes of amorphous solids. These studies on amorphous semi-conductors and superconductors and metal glasses have found and will continue to find technological applications, particularly because human proteins have much in common with amorphous solids, and that the solution to the nuclear waste problem may well rest on safe, million-year containment in doped glasses. Also, the results from these studies in organic systems will impact experimentalists and theoreticians working on other materials. ***

小行星9307034 该项目将基于激光的技术与一种新的实用方法相结合，用于制造薄（数十微米或更小）的超淬火玻璃膜。 新的，强大的实验技术，如光谱烧孔和相干时域光谱将被用来开发一个充分的理解非晶固体的物理。 该研究涉及非晶固体的无序、低能激发和低温构型弛豫（隧穿）过程的各个方面。 在实验研究中将使用选定数量的有机液体和水。 本研究主要分为三个部分：1）研究超淬冷玻璃和其他非晶固体薄膜中的无序和弛豫现象; 2）研究热导率和光谱扩散的温度依赖性; 3）探测非晶固体中特殊的无序诱导的低频振动模式。 这些关于非晶半导体、超导体和金属玻璃的研究已经发现并将继续发现技术应用，特别是因为人类蛋白质与非晶固体有许多共同之处，而核废料问题的解决方案很可能取决于掺杂玻璃中安全的百万年遏制。 此外，这些有机系统研究的结果将影响其他材料的实验学家和理论家。 ***