基于纳米结构的亚波长分光和滤波材料研究

项目名称： 基于纳米结构的亚波长分光和滤波材料研究

项目编号： No.61475070

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 彭茹雯

作者单位： 南京大学

项目金额： 90万元

中文摘要： 近年来光信息技术发展迅速，光子器件小型化很受关注,但是目前其小型化正受到衍射极限的严重制约，新近发展起来的亚波长光子学和等离激元学为解决这一问题提供了新思路。本项目拟从实验和理论两方面研究基于金属纳米线及其网络结构、介电/金属多层结构等微纳系统中表面等离激元的激发和传播规律，揭示该系统中光与等离激元相互转换的微观机制，实现光在亚波长结构中彩虹式传输，即选择性地传播多种模式并且将不同频率的光在空间分开，进而设计和制备出基于这些纳米结构的亚波长分光和滤波材料。在此基础上，通过改变纳米结构的周期性或准周期性来调控系统中传播型等离激元，通过改变单个纳米结构单元的构型来调控局域型等离激元，进而控制系统中传播光场和局域光场的振幅与位相在空间中的分布，设计和制备出高性能的亚波长分光和滤波材料，并探讨其在芯片光谱仪、亚波长波分复用器件等方面的应用，开发和研制具有自主知识产权的新型光电材料和器件。

中文关键词： 微纳光子学；光电功能材料；表面等离激元；纳米材料

英文摘要： In recent years, optical information technology has developed very rapidly, and much attention has been paid to the miniaturization of optical devices. However, it is challenged by the diffraction limit of light. With the capabilities of confining light into (deep) subwavelength volumes, plasmonics and subwavelength optics make it possible to dramatically miniaturize optical devices so as to integrate them into silicon chips. In this project, we are going to investigate subwavelength spectral spliters and filters based on metal/dielectric nanostructures. First, we will explore the physical mechanism on the excitation and propagation of surface plasmons (SPs) in metallic nanowire networks (including nanowires) and metal/dielectric multilayer nanostructures on silicon chips. Second, we will tune the propagated SPs by adjusting the periodicity or the quasiperiodicity of nanostructures; while we will tune the localizated SPs by changing the units in the nanostructures. By doing so, we will manipulate the spacial distributions of both the amplitude and the phase of the light wave in whole nanostructure. Third, we will design and fabricate the subwavelength spectral splitters and filters, where the light waves with different frequencies can be selectively guided and spatially separated. Consequently, a rainbow can be trapped in the nanostructure, and different colors can be spatially separated and chronologically released. The released light frequencies depend on the units and periodicities (or quasiperiodicities). Possible applications of those subwavelength spectral splitters and filters in developping state-of-art on-chip spectroscopy and miniaturized wavelength-division-multiplexing system will also be discussed.

英文关键词： nanophotonics;optomaterials;surface plasmons;nanomaterials