| 固体粉末的太赫兹折射率和吸收系数准确提取方法 |
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| 引用本文： | 刘泉澄,邓 琥,陈林宇,郭 进,熊中刚,尚丽平. 固体粉末的太赫兹折射率和吸收系数准确提取方法[J]. 太赫兹科学与电子信息学报, 2021, 19(3): 370-374 |
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| 作者姓名： | 刘泉澄 邓 琥 陈林宇 郭 进 熊中刚 尚丽平 |
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| 作者单位： | School of Information Engineering，Southwest University of Science and Technology，Mianyang Sichuan 621010，China |
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| 基金项目： | 国家自然科学基金资助项目(11872058) |
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| 摘 要： | 为解决固体粉末类物质太赫兹折射率和吸收系数提取不准确的问题,采用太赫兹时域光谱(THz-TDS)技术以聚乙烯(PE)与聚四氟乙烯(PTFE)为研究对象,分析一元和二元混合粉中孔隙率对光学参数提取的影响;以有效介质理论为基础,提出基于Landau-Lifshitz-Looyenga(LLL)模型的折射率和吸收系数提取方法...
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| 关 键 词： | 太赫兹时域光谱 有效介质模型 折射率 吸收系数 固体粉末 |
| 收稿时间： | 2020-11-05 |
| 修稿时间： | 2021-01-06 |
Accurate extraction method of terahertz refractive index and absorption coefficient of solid powder |
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| LIU Quancheng,DENG Hu,CHEN Linyu,GUO Jin,XIONG Zhonggang,SHANG Liping. Accurate extraction method of terahertz refractive index and absorption coefficient of solid powder[J]. Journal of Terahertz Science and Electronic Information Technology, 2021, 19(3): 370-374 |
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| Authors: | LIU Quancheng DENG Hu CHEN Linyu GUO Jin XIONG Zhonggang SHANG Liping |
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| Abstract: | Aiming to provide an accurate method to calculate the refractive index and absorption coefficient of solid powder materials in terahertz region, the effects of porosities of unary and binary powders on the extraction of optical parameters are studied by taking polyethylene(PE) and polytetrafluoroethylene(PTFE) as examples. Based on the effective medium theory, the refractive indexes of PE and PTFE are calculated by using Landau-Lifshitz-Looyenga(LLL) model, and the results are in consistent with the refractive indexes of thermoplastic plates of PE and PTFE. This research is help for constructing terahertz standard spectra database of solid powder as well as the quantitative identification. |
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