纳米结构电磁工程微观原理研究

Research on Microscopic Fundamentals for Electromagnetic Engineering of Nanostructures

本文分析了金属 /电介质纳米多层膜的电磁响应和能量转换的物理原理 ,提出了基本理论框架 ,讨论了电磁响应的前提条件、透射效应、电磁响应模式、等离子模型、响应模式效率和本构特性的尺寸效应。实验结果表明 ,超薄 Al、Ti、Fe膜在纳米尺寸范围内 ,随厚度变化 ,电导率、光学常数、介电常数、磁导率、载流子浓度和等离子体共振均存在尺寸效应。本文还讨论了纳米结构设计的基本原理。

To understand the physical mechanism of electromagnetic response and potential energy conversion mode in nano structures, especially in metal/dielectric nanocomposite multilayer, a theoretic framework has been suggested. It involves the prerequisite of electromagnetic response, transmission effect, mode of response, plasma model, efficiency of response mode, and size effect of constitutive characteristics. Experimental results have proved that size effect exists for electrical conductivity,optical constants, permittivity, permeability and carrier density in ultrathin Al Ti and Fe films as the thickness of the film decreases to nanometer size range. Principles for designing nanostructures are discussed.