Multi-layered full-field phase imaging using continuous-wave terahertz ptychography

被引：24
|
作者：
Wang, Dayong [1 ,2 ]
Li, Bing [1 ]
Rong, Lu [1 ,2 ]
Tan, Fangrui [1 ]
Healy, John J. [3 ,4 ]
Zhao, Jie [1 ]
Wang, Yunxin [1 ,2 ]
机构：
[1] Beijing Univ Technol, Coll Appl Sci, 100 Ping Le Yuan, Beijing 100124, Peoples R China
[2] Beijing Engn Res Ctr Precis Measurement Technol &, 100 Ping Le Yuan, Beijing 100124, Peoples R China
[3] Univ Coll Dublin, Coll Architecture & Engn, Sch Elect & Elect Engn, Dublin 4, Ireland
[4] Beijing Univ Technol, Beijing Dublin Int Coll, 100 Ping Le Yuan, Beijing 100124, Peoples R China
来源：
OPTICS LETTERS | 2020年 / 45卷 / 06期
基金：
中国国家自然科学基金;
关键词：
RECONSTRUCTION; OBJECT;
D O I：
10.1364/OL.384589
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Due to the unique properties of terahertz (THz) waves, THz phase imaging has been widely investigated to retrieve the absorption and phase modulation of dielectric two-dimensional thin samples, as well as multiple stacked samples. In this Letter, we apply the three-dimensional ptychographic iterative engine algorithm for continuous-wave THz full-field multi-layered phase imaging. The complex-valued transmission function of two-layered polypropylene thin plates and the corresponding probe function are reconstructed, respectively, which are immune to crosstalk of different layers. The phenomenon of the field-of-view enlargement at the second object layer is observed. This lensless compact imaging method can be potentially used for THz three-dimensional imaging. (C) 2020 Optical Society of America
引用
收藏
页码：1391 / 1394
页数：4
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