Terahertz spectroscopy of graphene complementary split ring resonators with gate tunability
Terahertz spectroscopy of graphene complementary split ring resonators with gate tunability
复制标题
DOI：
10.7567/jjap.56.095102
复制
发表时间：
2017-08
影响因子：
1.5
通讯作者：
Satoru Suzuki;Y. Sekine;K. Kumakura
中科院分区：
文献类型：
--
作者：
Satoru Suzuki;Y. Sekine;K. Kumakura
在太赫兹区域的偏振透射和反射光谱，从石墨烯互补开口环谐振器设备获得。与离子凝胶栅电极相结合的互补结构使得器件的光学特性可调。在带内等离子体共振的振荡器强度大大增强与栅极电压诱导的掺杂，和吸收超过2.3%/层的带间跃迁。谐振频率也可以随着栅极电压的增加而大大增加。这些结果表明石墨烯基超材料具有可调磁导率或介电常数和可调谐振频率的可能性。
Polarized transmission and reflection spectra in the terahertz region were obtained from a graphene complementary split ring resonator device. The complementary structure combined with an ion gel gate electrode rendered the optical properties of the device tuneable. The oscillator strength at the intraband plasmon resonance was largely enhanced with the gate-voltage-induced doping, and absorption exceeded 2.3%/layer of the interband transition. The resonance frequency could also be largely increased with the gate voltage. These results suggest the possibility of graphene-based metamaterials with tuneable permeability or permittivity and tuneable resonance frequencies.