电磁特异材料相位光学及波束调控的研究

项目名称： 电磁特异材料相位光学及波束调控的研究

项目编号： No.11204218

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 魏泽勇

作者单位： 同济大学

项目金额： 30万元

中文摘要： 电磁特异材料具有很多新奇的物理现象和广阔的应用前景，是当前光电子学领域前沿研究方向之一，有关其对于光波相位、波束控制的研究是热点课题。本课题拟从理论和实验两方面研究平面电磁特异材料对于相位、振幅和极化的控制，以实现高效的波束偏转和波束整形。提出利用多层超透射结构宽范围调控出射波相位，用于波束偏转预期能大大增加其效率。提出利用对振幅和相位的独立操控，实现平面波到涡旋波束的直接转换。预先研究证明实现宽带超透射、宽带相位调控、宽带极化控制方法可行，时域有限差分仿真证明手性排列的旋转劈裂圆环结构可以实现对轨道角动量的调控，初步证明所构思技术路线可行，基础研究方面理论和实验储备充分，可以支撑项目的开展。如果获得资助将可以圆满完成本申请课题。

中文关键词： 特异材料；相位；波束；超透射；

英文摘要： Metamaterials, a kind of artificial structures with extraordinary electromagnetic responses not available from materials existing in nature, have attracted intensive investigation, especially on their capacity of phase manipulation and beam shaping. In this project, full control of light, including phase, amplitude, and polarization, will be implemented theoretically and experimentally with metamaterials, which makes the efficient beam steering and beam shaping viable. Multilayered structures are proposed to change the phase of outgoing waves over a wide range while maintain high transmittivity, which is expected to improve the efficiency of beam steering. Flexible and independent control of amplitude and phase at each grid makes it possible to generate vortex beam directly from plane wave excitation. Prior studies prove the route feasible to realize broadband transmission, phase manipulation, and polarization control. FDTD simulations of twisted CSRRs imply the manipulation of OAM with the structure. This project is well supported by the feasible scheme and abundant reserve in theory and experiment condition, and will be accomplished successfully with the grant.

英文关键词： metamaterial；phase；beam；enhanced transmission；