极薄金属膜层在冲击压力下的瞬态光反射透射特性研究

项目名称： 极薄金属膜层在冲击压力下的瞬态光反射透射特性研究

项目编号： No.11272298

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 陈光华

作者单位： 中国工程物理研究院流体物理研究所

项目金额： 86万元

中文摘要： 金属膜层的光传播特性由金属的电导率和介电常数等物理性质以及膜层厚度等参数决定。在冲击压力作用下，电导率、介电常数和膜层厚度等发生变化，导致光反射透射特性变化。研究金属膜层在冲击下的光传播性质，可提供一种新的冲击压力测量方法，特别是当膜层厚度仅有纳米量级时，有可能提供一种诊断冲击前沿压力剖面的超高时间分辨测量技术。 该项目将从实验和理论两方面研究不同材料不同厚度的极薄金属膜层(5nm～50nm)在冲击压力下的瞬态光反射透射特性，建立理论模型，制备金属膜层样品，开展冲击加载实验，利用实验数据建立经验关系式并与理论模型相互校验；此外，还将搭建超高时间分辨诊断系统，开展超快的冲击前沿诊断实验研究，获取冲击前沿的上升时间等参数。

中文关键词： 极薄金属膜；冲击压力；反射率；透射率；超快诊断

英文摘要： The light transmission characteristics of metal film are determined by conductivity, dielectric constant and other property of metal as well as film thickness. Under shock pressure, conductivity, dielectric constant, film thickness, etc. of the metel film will be changed, therefore the light transmission characteristics will also be changed. Studying the light transmission characteristics of metal film under shock pressure is helpful to develop a new method for shock pressure measurement. It is able to diagnose the pressure profile of shock front with ultrahigh temporal resolution, especially when the film thickness is of nanometer magnitude. In this project, we will study the light transmission characteristics of metal film made of different materials and with different thicknesses (5nm～50nm) under shock pressure both theoretically and experimentally. It includes to build theoretic model, to prepare metal film samples, to perform shock loading experiments, to establish empirical formula from experimental data, and to analyze it with theoretic model. Furthermore, we will develop a diagnostic system with ultrahigh temporal resolution and perform ultrafast shock front diagnostic experiments to obtain shock front rise-time, etc.

英文关键词： ultra-thin metal film；shock pressure；reflectivity；transmittance；ultra-fast diagnostics