光在强色散合金膜及颗粒膜界面反常折射过程中相位突变研究

项目名称： 光在强色散合金膜及颗粒膜界面反常折射过程中相位突变研究

项目编号： No.61275160

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 郑玉祥

作者单位： 复旦大学

项目金额： 78万元

中文摘要： 本项目拟对光在金属合金薄膜或金属颗粒膜边界传播时发生的表面相位突变效应、正/负折射效应等特性进行研究。利用电子束蒸发设备、离子束溅射系统等制备高质量的合金膜（或颗粒膜）样品，合金膜（或颗粒膜）由在特定波长内具有负表观折射率的金属和正折射率的金属（或非金属）组成，并对有效折射率、折射角等物理量随入射角、波长、金属颗粒尺度、合金膜组分等参数变化规律进行实验测量，尝试寻找到折射率为零或无限接近于零的奇异点组分，预期可以发现奇异的折射和反射特性，对其机理进行分析研究，增进人们对光在金属颗粒膜及合金膜边界复杂传播特性的认识，并为其在信息光学等领域的应用提供科学依据。

中文关键词： 光学性质；合金膜；颗粒膜；薄膜；折射率

英文摘要： This project will focus on the study of the phase discontinuity, positive/negative refraction effects occured at the surface of metal-based films with strong dispersion during refraction of light. The electron beam deposition system and ion beam sputtering system will be used to prepare the samples of alloy films and granular films. The alloy films/ granular films consist of noble metal with negative index of refraction in certain wavelength band and the metal/nonmetal material of positive index of refraction. The dependence of the effective index of refraction, refractive angle on the incident angle, wavelength of light, as well as the size of metal granule, component of alloys etc. will be measured and analyzed. It is expected to find null effective index of refraction for some alloy films and granule films in certain wavlength band, which may show anomalous refraction and reflection properties of the films. The better understanding of the interacting mechanism of light with these films with strong dispersion will provide scientific references for their various applications, especialy in the field of information science and technology.

英文关键词： Optical properties；Alloy films；Granule Films；Thin films；Refractive index