Full-transparent zone plates for THz focusing

作     者：Hui Yin Jiaqi Li Huawei Liang Min Zhang Hong Su Ireng Ling Li 尹慧;李佳奇;梁华伟;张敏;苏红;李玲

作者机构：Shenzhen Key Laborato~：y of Laser Engineering Shenzhen UniverMty Shenzhe~J 518060 China Gmmgdong Provincial Key Laborato~y of 3/licro/Nano Optomechatro~ics Eng＇i~eering Shenzhen Univez：~ity Shenzhen 518060 China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2018年第16卷第8期

页      面：67-70页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：supported in part by the National Natural Science Foundation of China(No.61405124) the Fund Project for Shenzhen Fundamental Research Programme,China(No.JCYJ20170818143652693) the Major Science and Technology Project of Guangdong Province(No.2014B010131006) 

主　　题：THz Full-transparent zone plates for THz focusing 

摘      要：A fllll-transparent zone plate （FTZP）, which can reuse tile wave blocked in the focusing of the Fresncl zone plate （FZP）, is proposed to improve the efficiency of terahertz （THz） focusing without aberration. We find that the substrate thickness of the FTZP has a great influence on the focusing intensity, which results from file Fabry-Perot effect. Tile focusing efficiency of FTZPs could be about twice as high as that of FZPs. but the widths of both focus spots are comparable with the wavelength. The experimental results are in good agreement with the simulation.