论文部分内容阅读
提出了一种提高超常材料折射率传感灵敏度的方法。在超常材料完美吸收结构的基础上,通过改变电介质圆盘直径,探究折射率传感性能的变化。结果表明,随着电介质层圆盘直径的减小,折射率传感灵敏度和品质因子都有了近3倍的提高并趋于极限值。通过对电介质层电场分布的分析,进一步证实了适当减小电介质圆盘尺寸可有效的提高传感性能这一结论。这种新的设计方法同时具有高灵敏度、高品质因子的特点,对于超常材料的折射率传感应用研究提供了重要参考和依据。
A method to improve the sensing sensitivity of metamaterial refractive index is proposed. On the basis of the perfect absorption structure of metamaterials, the change of refractive index sensing performance is explored by changing the diameter of the dielectric disk. The results show that with the decrease of the disc diameter, the sensitivity and the quality factor of refractive index have nearly tripled and reached the limit value. Through the analysis of the electric field distribution of the dielectric layer, it is further confirmed that the proper reduction of the dielectric disc size can effectively improve the sensing performance. This new design method also has the characteristics of high sensitivity and high quality factor, which provides an important reference and basis for the research of refractive index sensing of metamaterials.