Terahertz wavefront manipulating by double-layer graphene ribbons metasurface
Terahertz wavefront manipulating by double-layer graphene ribbons metasurface
复制标题
双层石墨烯带超表面操控太赫兹波前
DOI:
10.1016/j.optcom.2017.06.044
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发表时间:
2017-11
影响因子:
2.4
通讯作者:
Yao Jianquan
中科院分区:
文献类型:
--
作者:
Zhao Honghang;Chen Zhihong;Su Fei;Ren Guangjun;Liu Fei;Yao Jianquan
It was recently presented that the phase gradient metasurface can focus the reflection in terahertz range. However, narrow bandwidth and complex tuning method are still challenges. For instance, the size is difficult to be changed once the device is built. We propose a tunable double-layer graphene ribbons array (DLGRA) metasurface which has great potentials for applications in terahertz wavefront control. By changing the Fermi level of each graphene ribbon independently, the DLGRA separated by a bonding agent and a thin dielectric spacer can achieve nearly 2 π phase shift with high reflection efficiency. A reflector which can focus terahertz waves over a broad frequency range is demonstrated numerically by the DLGRA. Intriguingly, through a lateral shift between the nearby graphene ribbons, the variation of coupling induces a shift of focusing frequency. Hence, this approach increases the frequency range to a higher degree than the fixed state. The proposed metasurface provides an effective way for manipulating terahertz waves in a broad frequency range.
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DOI:
10.3390/s90604559
发表时间:
2009
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
作者:
Tsuda H;Urabe K
通讯作者:
Urabe K
影响因子:
3.8
作者:
Lu, Wei Bing;Zhu, Wei;Cui, Tie Jun
通讯作者:
Cui, Tie Jun
影响因子:
17.1
作者:
Fang, Zheyu;Thongrattanasiri, Sukosin;Javier Garcia de Abajo, F.
通讯作者:
Javier Garcia de Abajo, F.
影响因子:
3.6
作者:
Cheng, Jierong;Mosallaei, Hossein
通讯作者:
Mosallaei, Hossein
影响因子:
2.4
作者:
Tian Bo Tan;G. Ren;L. Ying;Y. Wang;Jianquan Yao
通讯作者:
Tian Bo Tan;G. Ren;L. Ying;Y. Wang;Jianquan Yao