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Photomechanical meta-molecule array for real-time terahertz imaging
Real-time terahertz (THz) imaging offers remarkable application possibilities, especially in the security and medical fields. However, most THz detectors work with scanners, and a long image acquisition time is required. Some thermal detectors can achieve real-time imaging by using a focal plane arr...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6444985/ https://www.ncbi.nlm.nih.gov/pubmed/31057887 http://dx.doi.org/10.1038/micronano.2017.71 |
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author | Wen, Yongzheng Jia, Delin Ma, Wei Feng, Yun Liu, Ming Dong, Liquan Zhao, Yuejin Yu, Xiaomei |
author_facet | Wen, Yongzheng Jia, Delin Ma, Wei Feng, Yun Liu, Ming Dong, Liquan Zhao, Yuejin Yu, Xiaomei |
author_sort | Wen, Yongzheng |
collection | PubMed |
description | Real-time terahertz (THz) imaging offers remarkable application possibilities, especially in the security and medical fields. However, most THz detectors work with scanners, and a long image acquisition time is required. Some thermal detectors can achieve real-time imaging by using a focal plane array but have the drawbacks of low sensitivity due to a lack of suitable absorbing materials. In this study, we propose a novel photomechanical meta-molecule array by conveniently assembling THz meta-atom absorbers and bi-material cantilevers together, which can couple THz radiation to a mechanical deflection of the meta-molecules with high efficiency. By optically reading out the mechanical deflections of all of the meta-molecules simultaneously, real-time THz imaging can be achieved. A polyimide sacrificial layer technique was developed to fabricate the device on a glass wafer, which facilitates the transmission of a readout light while the THz wave radiates onto the meta-molecule array directly from the front side. THz images and video of various objects as well as infrared images of the human body were captured successfully with the fabricated meta-molecule array. The proposed photomechanical device holds promise in applications in single and broadband THz as well as infrared imaging. |
format | Online Article Text |
id | pubmed-6444985 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-64449852019-05-03 Photomechanical meta-molecule array for real-time terahertz imaging Wen, Yongzheng Jia, Delin Ma, Wei Feng, Yun Liu, Ming Dong, Liquan Zhao, Yuejin Yu, Xiaomei Microsyst Nanoeng Article Real-time terahertz (THz) imaging offers remarkable application possibilities, especially in the security and medical fields. However, most THz detectors work with scanners, and a long image acquisition time is required. Some thermal detectors can achieve real-time imaging by using a focal plane array but have the drawbacks of low sensitivity due to a lack of suitable absorbing materials. In this study, we propose a novel photomechanical meta-molecule array by conveniently assembling THz meta-atom absorbers and bi-material cantilevers together, which can couple THz radiation to a mechanical deflection of the meta-molecules with high efficiency. By optically reading out the mechanical deflections of all of the meta-molecules simultaneously, real-time THz imaging can be achieved. A polyimide sacrificial layer technique was developed to fabricate the device on a glass wafer, which facilitates the transmission of a readout light while the THz wave radiates onto the meta-molecule array directly from the front side. THz images and video of various objects as well as infrared images of the human body were captured successfully with the fabricated meta-molecule array. The proposed photomechanical device holds promise in applications in single and broadband THz as well as infrared imaging. Nature Publishing Group 2017-12-04 /pmc/articles/PMC6444985/ /pubmed/31057887 http://dx.doi.org/10.1038/micronano.2017.71 Text en Copyright © 2017 The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Wen, Yongzheng Jia, Delin Ma, Wei Feng, Yun Liu, Ming Dong, Liquan Zhao, Yuejin Yu, Xiaomei Photomechanical meta-molecule array for real-time terahertz imaging |
title | Photomechanical meta-molecule array for real-time terahertz imaging |
title_full | Photomechanical meta-molecule array for real-time terahertz imaging |
title_fullStr | Photomechanical meta-molecule array for real-time terahertz imaging |
title_full_unstemmed | Photomechanical meta-molecule array for real-time terahertz imaging |
title_short | Photomechanical meta-molecule array for real-time terahertz imaging |
title_sort | photomechanical meta-molecule array for real-time terahertz imaging |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6444985/ https://www.ncbi.nlm.nih.gov/pubmed/31057887 http://dx.doi.org/10.1038/micronano.2017.71 |
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