NSF Young Investigator

在电子材料的纳米尺度热工程领域，规划了一个平衡的实验和理论研究计划。研究将集中在(1)亚微米尺度结构的热性质、热产生和输运；(3)界面间的热传递。这些研究将在电子和光电材料上进行，如硅，III-V半导体，如砷化镓及其合金，以及金属。典型的应用涉及高电场，导致非平衡电子能量分布。电子-声子相互作用进一步导致非平衡声子相互作用。理论/数值研究将涉及开发用于非平衡电子和声子输运的蒙特卡罗模拟包。实验研究将包括用扫描隧道显微镜（STM）和原子力显微镜（AFM）进行测量。研究了一种利用原子力显微镜测量有效晶格温度和电子温度的纳米分辨率技术。本文还将研究与电子隧道热传递相关的热电效应。这些研究对纳米工程具有重要的基础意义，也可用于开发纳米尺度的温度和热流隧道传感器。

A balanced experimental and theoretical research program in the area of nanometer-scale thermal engineering in electronic materials is planned. Research will be focused on (1) thermal properties, heat generation and transport in sub-micrometer-scale structures; (measurement of temperature and thermal properties at nanometer scales; (3) heat transfer across interfaces. These studies will be carried out on electronic and opto-electronic materials such as silicon, III-V semiconductors like gallium arsenide and its alloys, as well as metals. Typical applications involve high electric fields, leading to non-equilibrium electron energy distributions. Electron-phonon interactions further lead to non-equilibrium phonon interactions. Theoretical/numerical studies will involve the development of Monte Carlo simulation packages for transport of non-equilibrium electrons and phonons. Experimental studies will involve measurements made with the scanning tunneling microscope (STM) and the atomic force microscope (AFM). A technique to use AFM to measure effective lattice and electron temperatures with nanometer resolution will be developed. Studies of the thermoelectric effect associated with heat transport by electron tunneling will also be studied. The studies are of fundamental importance to nanoengineering and may also have applications in the development of nanometer-scale tunneling sensors for temperature and heat flux.