超表面太赫兹自旋霍尔元件的研制与表征

项目名称： 超表面太赫兹自旋霍尔元件的研制与表征

项目编号： No.11474206

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 王新柯

作者单位： 首都师范大学

项目金额： 100万元

中文摘要： 太赫兹光谱与成像技术作为新兴的光学测量手段，已经在众多科研和工业领域显示了其巨大的应用价值，因此人们对太赫兹系统小型化、集成化、多功能化的需求就愈发迫切。基于金属亚波长结构对电磁波的特殊调制作用，超表面元件的出现为增强太赫兹系统的实用性提供了全新的发展方向。本项目将基于光子自旋霍尔效应，通过天线共振理论和矢量光学算法对金属亚波长结构在太赫兹波段的偏振选择特性进行研究，进而利用衍射光学元件设计方法研制具有多角度折射、多焦点聚焦、相位全息和涡旋相位板等功能的超表面太赫兹自旋霍尔元件。本项目将通过微加工光刻技术对所设计的超表面元件进行制备，并利用太赫兹时域光谱和成像系统对其性能进行表征。本项目的顺利实施，将发展超表面太赫兹元件的设计理论，拓宽太赫兹技术的应用领域，推动太赫兹技术的市场化进程。

中文关键词： 太赫兹；超表面；自旋霍尔元件；反常折射

英文摘要： As novel optical measurement methods, the terahertz (THz) sensing and imaging technologies have exhibited strong application values on many fundamental researches and industrial fields. Therefore, it is urgent for miniaturation, integration and multi-functions of the THz system. Based on the special modulation of the metallic sub-wavelength structures to electro-magnetic waves, meta-surface THz elements provide a new development direction for increasing the practicability of the THz system. In this project, based on the spin Hall effect of a light, the polarization dependent properties of metallic sub-wavelength structures in the THz frequency range are studied by using the antenna resonance theory and vectorial optical algorithm. Moreover, by using the diffraction optical element design theory, meta-surface THz spin Hall elements are investigated, which possess the multi-angles refraction, multi-focusing, phase hologram, vortex phase plate, and so on. The photetch is used to fabricate these designed meta-surface elements and the THz time-domain sensing and imaging technologies are used to characterize their performances. The achievement of this project will develop the design theory of the meta-surface THz elements. The project will increase the application fields of the THz technology and promote its commercial process.

英文关键词： Terahertz;Meta-surface;Spin Hall element;Anomalous refraction