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Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet
The terahertz (THz) modulator, which will be applied in next-generation wireless communication, is a key device in a THz communication system. Current THz modulators based on traditional semiconductors and metamaterials have limited modulation depth or modulation range. Therefore, a THz modulator ba...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5665991/ https://www.ncbi.nlm.nih.gov/pubmed/29093517 http://dx.doi.org/10.1038/s41598-017-13864-5 |
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author | Fan, Zhiyuan Geng, Zhaoxin Lv, Xiaoqin Su, Yue Yang, Yuping Liu, Jian Chen, Hongda |
author_facet | Fan, Zhiyuan Geng, Zhaoxin Lv, Xiaoqin Su, Yue Yang, Yuping Liu, Jian Chen, Hongda |
author_sort | Fan, Zhiyuan |
collection | PubMed |
description | The terahertz (THz) modulator, which will be applied in next-generation wireless communication, is a key device in a THz communication system. Current THz modulators based on traditional semiconductors and metamaterials have limited modulation depth or modulation range. Therefore, a THz modulator based on annealed tungsten disulfide (WS(2), p-type) and high-resistivity silicon (n-type) is demonstrated. Pumped by a laser, the modulator presents a laser power-dependent modulation effect. Ranging from 0.25 to 2 THz, the modulation depth reaches 99% when the pumping laser is 2.59 W/cm(2). The modulator works because the p-n heterojunction can separate and limit carriers to change the conductivity of the device, which results in a modulation of the THz wave. The wide band gap of WS(2) can promote the separation and limitation of carriers to obtain a larger modulation depth, which provides a new direction for choosing new materials and new structures to fabricate a better THz modulator. |
format | Online Article Text |
id | pubmed-5665991 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56659912017-11-08 Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet Fan, Zhiyuan Geng, Zhaoxin Lv, Xiaoqin Su, Yue Yang, Yuping Liu, Jian Chen, Hongda Sci Rep Article The terahertz (THz) modulator, which will be applied in next-generation wireless communication, is a key device in a THz communication system. Current THz modulators based on traditional semiconductors and metamaterials have limited modulation depth or modulation range. Therefore, a THz modulator based on annealed tungsten disulfide (WS(2), p-type) and high-resistivity silicon (n-type) is demonstrated. Pumped by a laser, the modulator presents a laser power-dependent modulation effect. Ranging from 0.25 to 2 THz, the modulation depth reaches 99% when the pumping laser is 2.59 W/cm(2). The modulator works because the p-n heterojunction can separate and limit carriers to change the conductivity of the device, which results in a modulation of the THz wave. The wide band gap of WS(2) can promote the separation and limitation of carriers to obtain a larger modulation depth, which provides a new direction for choosing new materials and new structures to fabricate a better THz modulator. Nature Publishing Group UK 2017-11-01 /pmc/articles/PMC5665991/ /pubmed/29093517 http://dx.doi.org/10.1038/s41598-017-13864-5 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Fan, Zhiyuan Geng, Zhaoxin Lv, Xiaoqin Su, Yue Yang, Yuping Liu, Jian Chen, Hongda Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet |
title | Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet |
title_full | Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet |
title_fullStr | Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet |
title_full_unstemmed | Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet |
title_short | Optical Controlled Terahertz Modulator Based on Tungsten Disulfide Nanosheet |
title_sort | optical controlled terahertz modulator based on tungsten disulfide nanosheet |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5665991/ https://www.ncbi.nlm.nih.gov/pubmed/29093517 http://dx.doi.org/10.1038/s41598-017-13864-5 |
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