Mode coupling in terahertz metamaterials using sub-radiative and super-radiative resonators

作者：Qiao, Shen; Zhang, Yaxin^*; Zhao, Yuncheng; Liang, Shixiong; Xu, Gaiqi; Sun, Han; Yang, Ziqiang

来源：Journal of Applied Physics, 2015, 118(19): 193104.

DOI：10.1063/1.4936169

• ELECTROMAGNETICALLY INDUCED TRANSPARENCY
• SHARP FANO RESONANCES
• MONOLAYERS
• ANALOG

We theoretically and experimentally explored the electromagnetically induced transparency (EIT) mode-coupling in terahertz (THz) metamaterial resonators, in which a dipole resonator with a super-radiative mode is coupled to an inductance-capacitance resonator with a sub-radiative mode. The interference between these two resonators depends on the relative spacing between them, resulting in a tunable transparency window in the absorption spectrum. Mode coupling was experimentally demonstrated for three spacing dependent EIT metamaterials. Transmittance of the transparency windows could be either enhanced or suppressed, producing different spectral linewidths. These spacing dependent mode-coupling metamaterials provide alternative ways to create THz devices, such as filters, absorbers, modulators, sensors, and slow-light devices.

• 出版日期2015-11-21
• 单位电子科技大学