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Chin. Opt. Lett.
 Home  List of Issues    Issue 08 , Vol. 16 , 2018    10.3788/COL201816.082601


Full-transparent zone plates for THz focusing
Hui Yin1;2, Jiaqi Li1;2, Huawei Liang1;2, Min Zhang1;2, Hong Su1;2, and Ireng Ling Li1;2
1 Shenzhen Key Laboratory of Laser Engineering, [Shenzhen University], Shenzhen 51 8060, China
2 Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, [Shenzhen University], Shenzhen 518060, China

Chin. Opt. Lett., 2018, 16(08): pp.082601

DOI:10.3788/COL201816.082601
Topic:Physical optics
Keywords(OCIS Code): 260.3090  050.1940  

Abstract
A full-transparent zone plate (FTZP), which can reuse the wave blocked in the focusing of the Fresnel 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 the Fabry–Perot effect. The 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.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2018/4/9
Accepted:2018/6/6
Posted online:2018/7/2

Get Citation: Hui Yin, Jiaqi Li, Huawei Liang, Min Zhang, Hong Su, and Ireng Ling Li, "Full-transparent zone plates for THz focusing," Chin. Opt. Lett. 16(08), 082601(2018)

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



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