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Full-transparent zone plates for THz focusing

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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.

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DOI:10.3788/col201816.082601

所属栏目:Physical optics

基金项目: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).

收稿日期:2018-04-09

录用日期:2018-06-06

网络出版日期:2018-07-02

作者单位    点击查看

Hui Yin:Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Shenzhen University, Shenzhen 518060, China
Jiaqi Li:Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Shenzhen University, Shenzhen 518060, China
Huawei Liang:Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Shenzhen University, Shenzhen 518060, China
Min Zhang:Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Shenzhen University, Shenzhen 518060, China
Hong Su:Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Shenzhen University, Shenzhen 518060, China
Ireng Ling Li:Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Shenzhen University, Shenzhen 518060, China

联系人作者:Min Zhang(zhangmin@szu.edu.cn)

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引用该论文

Hui Yin, Jiaqi Li, Huawei Liang, Min Zhang, Hong Su, Ireng Ling Li, "Full-transparent zone plates for THz focusing," Chinese Optics Letters 16(8), 082601 (2018)

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