Lan Shi, Qingli Zhou, Wanlin Liang, GeLi, Jianhai Sun, Cunlin Zhang
https://www.sciencedirect.com/science/article/abs/pii/S0030401819303086
We experimentally and numerically demonstrate resonant behaviors of terahertz metamaterials can be tuned significantly by their asymmetry. For the ring structure cut symmetrically, transmission spectra are nearly the same as those of their individual single-ring resonators. However, three resonant dips appear in the spectra due to the broken symmetry in single-ring resonator cut asymmetrically from the top. For the asymmetrically-cut double-ring structures, the mutual coupling between four arcs results in multi-resonance dips, especially a low-frequency Fano-like resonance accompanied with a sharp peak. Our asymmetric structures could offer potential applications in terahertz frequency selectors and bio-sensors.
No comments:
Post a Comment