A dynamically reconfigurable Fano metamaterial through graphene tuning for switching and sensing applications.
A dynamically reconfigurable Fano metamaterial through graphene tuning for switching and sensing applications.
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DOI：
10.1038/srep02105
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发表时间：
2013
影响因子：
4.6
通讯作者：
Bagci, H.
中科院分区：
文献类型：
--
作者：
Amin, M.;Farhat, M.;Bagci, H.
我们报道了一种新型的电调谐石墨烯-金混合Fano谐振器。所提出的超材料由正方形石墨烯贴片和正方形金框架组成。窄和宽带偶极表面等离子体激元之间的相消干涉，分别在石墨烯贴片和金框架的表面上引起，导致电磁感应透明（EIT）的等离子体等效物。超材料的响应是偏振无关的，由于结构的对称性和其光谱特征被示出为通过改变施加到石墨烯贴片的栅极电压是高度可控的。此外，检索设备的有效群指数，并发现在EIT窗口内非常高，表明其在慢光应用中的潜在用途。潜在的结果，如高的传感能力和开关在太赫兹频率，通过数值模拟与现实的参数。
We report on a novel electrically tunable hybrid graphene-gold Fano resonator. The proposed metamaterial consists of a square graphene patch and a square gold frame. The destructive interference between the narrow- and broadband dipolar surface plasmons, which are induced respectively on the surfaces of the graphene patch and the gold frame, leads to the plasmonic equivalent of electromagnetically induced transparency (EIT). The response of the metamaterial is polarization independent due to the symmetry of the structure and its spectral features are shown to be highly controllable by changing a gate voltage applied to the graphene patch. Additionally, effective group index of the device is retrieved and is found to be very high within the EIT window suggesting its potential use in slow light applications. Potential outcomes such as high sensing ability and switching at terahertz frequencies are demonstrated through numerical simulations with realistic parameters.
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作者：
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