Ultrafast Spectroscopy of Nanostructures

这笔拨款是为了在布朗大学建立一个材料研究小组，研究纳米结构材料的超快光谱。这是一个连贯的、基本的研究项目，特别强调对特定纳米结构半导体电子材料的研究。重点是研究电子异质结构在电子和振动激励的实时动力学以及它们的耦合方面的超快激光光谱。这些激励的传播和相互作用，以及它们如何受到空间限制的影响，提供了该提案的主题。研究主题包括电子-声子相互作用、声子的传播、化合物半导体中电子现象的超快空间分辨光谱、金属薄膜中的超快电子动力学、半导体纳米结构中电子-声子相互作用的超快动力学。材料研究小组承担的材料研究的范围或复杂性，将无法通过传统的个人研究者的研究。通过一组具有不同背景的研究人员参与互动合作研究，进步得到了加强。

This grant is to establish a Materials Research Group at Brown University to do research on the topic of ultrafast spectroscopy of nanostructure materials. This is a coherent, basic program of research with a particular investigative emphasis on the study of specific nanostructured semiconductor-based electronic materials. The focus is defined by the study of electronic heterostructures in terms of real-time dynamics of electronic and vibrational excitations as well as their coupling by ultrafast laser spectroscopy. The propagation and interaction of these excitations, and how they are affected by spatial constraints provide the main theme of the proposal. Topics being investigated include electron-phonon interaction, propagation of phonons, ultrafast space resolved spectroscopy of electronic phenomena in compound semiconductors, ultrafast electron dynamics in metallic thin films, and ultrafast dynamics of electron-phonon interaction in semiconductor nanostructures. The Materials Research Group undertakes materials research of a scope or complexity that would not be feasible through traditional individual investigator research. Progress is enhanced through a group of investigators with diverse backgrounds participating in interactive, collaborative research.