RUI: Ultrafast Acoustics and Heat Transport in Nanostructures, Thin Films, and Crystals

RUI：纳米结构、薄膜和晶体中的超快声学和热传输

• 批准号: 1206681
• 负责人: Brian Daly
• 金额: $ 22.5万
• 依托单位: Vassar College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1206681&HistoricalAwards=false
• 关键词: RUI; Ultrafast; Acoustics; Heat; Transport

****Technical Abstract****This NSF award will support experimental condensed matter physics research at Vassar College in Poughkeepsie, NY, an undergraduate institution. This project will seek to answer fundamental materials research questions that are also of technological relevance. Ultrafast optical techniques will be used to study thermal and acoustic phenomena thin films, crystals, and nanostructures. In particular, the project will include studies of novel phononic bandgap structures made from silicon, amorphous hydrogenated films (a-Si:H and a-SiC:H), and bulk crystals (GaAs, GaN, SiC, and AlN). The project is expected to contribute answers to long-standing questions regarding the contributions of long-wavelength phonons to thermal transport and phonon attenuation mechanisms in amorphous and crystalline structures. The results contributed by this project will have an impact on a number of technologies including microelectronics, solar cells, and thermoelectric devices. The NSF award will support undergraduate student research at one of the nation's premier liberal arts colleges. 6 summer research students will be funded during the three-year project and many other students will benefit from the expansion of laboratory equipment provided through the award.****Non-Technical Abstract****This NSF award will support experimental materials physics research at Vassar College in Poughkeepsie, NY, an undergraduate institution. This project will seek to answer fundamental questions that are of technological relevance to the semiconductor and nanotech fields. Ultrafast lasers (which produce pulses less than a millionth of a millionth of a second in duration) will be used as a tool to study heat and ultrasound in novel, nanoscale structures made from silicon and other technologically important materials. A better understanding of the way heat and ultrasound transport energy in these materials will benefit ongoing research in a number of fields including microelectronics, solar energy, and thermoelectrics. The NSF award will support undergraduate student research at one of the nation's premier liberal arts colleges. 6 summer research students will be funded during the three-year project and many other students will benefit from the expansion of laboratory equipment provided through the award.

* 技术摘要 * 该NSF奖项将支持位于纽约州波基普西的瓦萨学院的实验凝聚态物理研究，该学院是一所本科院校。 该项目将寻求回答与技术相关的基础材料研究问题。 超快光学技术将用于研究薄膜、晶体和纳米结构的热和声学现象。 特别是，该项目将包括研究由硅，非晶氢化薄膜（a-Si：H和a-SiC：H）和块状晶体（GaAs，GaN，SiC和AlN）制成的新型声子带隙结构。 该项目预计将有助于回答长期存在的问题，即长波长声子对非晶和晶体结构中的热输运和声子衰减机制的贡献。 该项目的成果将对包括微电子、太阳能电池和热电器件在内的许多技术产生影响。 NSF奖将支持本科生在全国首屈一指的文科学院之一的研究。 在为期三年的项目期间，将资助6名暑期研究生，许多其他学生将受益于通过该奖项提供的实验室设备的扩展。非技术摘要 * 该NSF奖项将支持位于纽约州波基普西的瓦萨学院的实验材料物理研究，该学院是一所本科院校。 该项目将寻求回答与半导体和纳米技术领域技术相关的基本问题。 超快激光器（产生的脉冲持续时间小于百万分之一秒）将被用作研究由硅和其他技术重要材料制成的新型纳米结构中的热和超声的工具。 更好地了解这些材料中热量和超声波传输能量的方式将有助于微电子，太阳能和热电等多个领域的持续研究。 NSF奖将支持本科生在全国首屈一指的文科学院之一的研究。 在为期三年的项目期间，将资助6名暑期研究生，许多其他学生将受益于通过该奖项提供的实验室设备的扩展。