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| 太赫兹超材料传感器双开口针尖化设计 |
| Design of double opening needle point for terahertz metamaterial sensor |
| 投稿时间：2023-02-13 |
| DOI：10.3969/j.issn.1005-5630.202302130017 |
| 中文关键词: 太赫兹 超材料 针尖化 传感器 |
| 英文关键词:terahertz metamaterial needle point sensor |
| 基金项目:上海市国内科技合作重点项目（21015800200）；国家自然科学基金（61805140） |
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| 中文摘要: |
| 为了更深入地研究如何提高太赫兹超材料的品质因子，从而提高超材料传感器的检测灵敏度，对太赫兹超材料传感器结构进行了针尖化设计。以双开口方形环为例，对其双开口狭缝进行双针尖结构设计，通过理论仿真研究双侧开口针尖角度对太赫兹超材料传感器的共振频率、电流分布、共振峰半峰宽的影响。进一步根据公式计算出品质因子Q值，分析双针尖设计对双开口方形环检测灵敏度的增强效果。仿真结果表明，针尖角度为150°时，传感器的Q值可提升至未针尖化模型的5倍。所提出的针尖化设计也可适用于其他谐振器单元结构，将其引入现有的太赫兹超材料传感器设计中，将有助于进一步提高传感器检测灵敏度。 |
| 英文摘要: |
| In order to further study how to improve the quality factor of terahertz metamaterials and improve the detection sensitivity of metamaterials, we carried out the needle point design of a terahertz metamaterials sensor structure. In this paper, taking the double-opening square ring as an example, the double opening slit was designed with a double-needle structure. Through theoretical simulation, the influence of the angle of the double-sided open needle point on the resonant frequency, current distribution, and half-peak width of the resonant peak of the terahertz metamaterial sensor were studied. Furthermore, the Q value was calculated according to the formula, and the enhancement effect of the double-needle design on the detection sensitivity of the double-open square ring was analyzed. The simulation results show that when the needle angle is 150°, the Q value of the sensor can be increased to 5 times of the model without needle pointing. The needle point design proposed in this paper can also be applied to other resonator unit structures. Introducing it into the existing terahertz metamaterial sensor design will help to further improve the sensor detection sensitivity. |
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