Collaborative Research: ITR/AP - An Integrated Algorithm for Heat Conduction from Nano- too Macroscale

我们项目的目标是开发一种新的集成工程模拟工具，用于微电子和微光子元件的热传导-具有纳米级特征的微尺度系统。这项工作的全球影响将是量化，制表和传播声子特性，这对于这些设备中的热传导与经典状态下热辐射的发射率和消光系数等特性一样重要。新的分子动力学（MD）模拟将用于量化和参数化声子弛豫时间和声子界面现象。鉴于通过MD模拟获得的声子数据，新的玻尔兹曼方程的弹道扩散公式将使从纳米到宏观尺度的实际复杂热问题的解决成为可能。我们实现的模块化设计将有助于最终集成到设计软件中。这些计划的成果将应用于资讯科技系统的发展。它们由特征长度范围从纳米到微米的器件和组件构成，例如电信系统中使用的半导体激光器和异质结双极晶体管。目前，这种微纳米级元件的热设计是主要的挑战，因为傅里叶定律在这些尺度上失效，因为声子（大多数半导体器件中的主要热载子）的平均自由程很长，并且没有实际的替代方案。修订题目：ITR：一种从纳米尺度到宏观尺度的热传导集成算法开发的协同研究

The goal of our project is to develop a novel integrated engineering simulation tool for heat conduction in microelectronic and microphotonic components - microscale systems with nanoscale features. The global impact of this work will be to quantify, tabulate and disseminate phonon properties, which are as important for heat conduction in these devices as properties such as emissivity and extinction coefficient for thermal radiation in the classical regime. Novel molecular dynamics (MD) simulations will be used to quantify and parameterize phonon relaxation times and phonon-interface phenomena. Given the phonon data obtained through MD simulations, a new ballistic-diffusive formulation of the Boltzmann equation will enable the solution of realistically complex thermal problems from nano- to macroscales. A modular design of our implementation will facilitate an eventual integration into design software.The results from the projects will be applied for the development of Information technology systems. These are constructed from devices and components with characteristic length scales ranging from nanometers to micrometers, such as semiconductor lasers and heterojunction bipolar transistors used in telecommunication systems. Currently, the thermal design of such micro- and nanoscale components is major challenge because Fourier's law fails at these scales due to the long mean free path of phonons (the dominant heat carriers in most semiconductor devices) and there exists no practical alternative.Revised Title: ITR: Collaborative Research on the Development of an Integrated Algorithm for Heat Conduction form Nano- to Macroscale