Visible Measurement of Terahertz Power Based on Capsulized Cholesteric Liquid Crystal Film
Visible Measurement of Terahertz Power Based on Capsulized Cholesteric Liquid Crystal Film
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DOI：
10.3390/app8122580
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
Lei Wang;H. Qiu;T. Phan;Kosaku Kato;B. Kang;K. Takano;Yan-qing Lu;Lu-Jian Chen;Peng Lv;Kehan Yu;Wei Wei-Wei;B. Jin;M. Nakajima
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文献类型：
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作者：
Lei Wang;H. Qiu;T. Phan;Kosaku Kato;B. Kang;K. Takano;Yan-qing Lu;Lu-Jian Chen;Peng Lv;Kehan Yu;Wei Wei-Wei;B. Jin;M. Nakajima
我们展示了一种基于热致变色和热扩散效应的温度超敏封装胆甾型液晶薄膜来检测太赫兹（THz）功率的新方法，该方法可以清晰地观察到。呈现了高达 4.0 × 103 mW/cm2 的太赫兹强度的定量可视化。颜色变化区域的直径与稳定状态下高于 0.07 mW 的太赫兹辐射功率线性相关。此外，可以检测 1 秒辐射的太赫兹功率，与颜色变化区域呈抛物线关系。太赫兹功率计坚固耐用、经济高效、便携甚至灵活，可用于太赫兹成像、生物传感和检查等应用。
We demonstrate a new method to detect terahertz (THz) power using a temperature-supersensitive capsulized cholesteric liquid crystal film based on the thermochromic and thermodiffusion effect, which is clearly observed. A quantitative visualization of the THz intensity up to 4.0 × 103 mW/cm2 is presented. The diameter of the color change area is linearly dependent on the THz radiation power above 0.07 mW in the steady state. Moreover, the THz power can be detected for 1 sec of radiation with a parabolic relation to the color change area. The THz power meter is robust, cost-effective, portable, and even flexible, and can be used in applications such as THz imaging, biological sensing, and inspection.