Han Sun, Lan Wang, Yaxin Zhang, Feng Lan, Shixiong Liang, Kang Xue, Ziqiang Yang,
https://ieeexplore.ieee.org/document/8691625
With the adventure of metamaterials, there has been a tremendous advancement in the manipulation of the terahertz (THz) wave. However, the excitation of high-Q-factor resonance has been a great challenge in traditional metamaterials due to the ohmic and radiation losses. In this paper, the influence of the tip charge accumulation effect on the high-Q value meta-surface has been studied within the triangular array meta-surface. It is found that when the tip charges accumulation resonance from each pair of triangular units can couple with each other to construct a significant resonant mode which could trap more energy to achieve higher Q value. Moreover, the stacking of the induced charges distributed at the surface of the meta-unit making the coupling strength is further increased so that the strong tip charge accumulation effect could also affect the Q-value. The experiment verified this phenomenon, which shows the stronger coupling resonance and tip charges accumulation could result in the enhancement of the Q-value. This research has potential applications in high-Q THz devices.
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