中国激光, 2016, 43 (1): 0106005, 网络出版: 2015-12-31
高品质因数太赫兹超材料设计的仿真分析 下载: 634次
Simulation Analysis on the Designing of High-Q Terahertz Metamaterials
摘要
提出了一种以非对称双开口环谐振器为基本单元的新型高品质因数Q 太赫兹超材料结构。当入射电场为垂直极化时,所提出的结构在不同的太赫兹频段分别表现出束缚模谐振、混合模式谐振和偶极子谐振3 种谐振响应,通过改变其单元结构的开口位置和水平金属微带线间的垂直距离可以调节3个谐振响应的品质因数和中心谐振频率。其中,束缚模谐振的品质因数最高可达40,相应的3 dB 带宽约为11.1 GHz;混合模式谐振的品质因数可达16,相应的3 dB 带宽约为62.4 GHz。这种具有高Q 值的太赫兹超材料在高分辨率薄膜传感器、高性能窄带滤波器以及高频调制器中具有广泛的应用前景。
Abstract
Novel high quality factor Q terahertz metamaterials based on asymmetric double split ring resonator as unit cells are reported. When the incident electric field is polarized perpendicular to the ring gaps, the proposed structure simultaneously sustains, the trapped- mode resonance, the mixed- mode resonance and the dipole resonance in different terahertz frequency ranges. The quality factor and center resonance frequency of the resonances can be tuned by changing the gap position and vertical distance between the horizontal metal microstrip lines of the metamaterials unit cells. Numerical simulation results show that the stop band of trapped- mode resonance can reach almost narrow line width of 11.1 GHz and the corresponding quality factor is about 40; the line width of mixed-mode resonance is about 62.4 GHz and the corresponding quality factor is about 16. The proposed high-Q metamaterials have extensive applications in the fields of terahertz research, such as for the high-resolution thin-film sensors, high-performance narrow-band terahertz filters and high frequency modulators.
邢维, 延凤平, 谭思宇, 刘硕, 李立朝. 高品质因数太赫兹超材料设计的仿真分析[J]. 中国激光, 2016, 43(1): 0106005. Xing Wei, Yan Fengping, Tan Siyu, Liu Shuo, Li Lizhao. Simulation Analysis on the Designing of High-Q Terahertz Metamaterials[J]. Chinese Journal of Lasers, 2016, 43(1): 0106005.