Tunable and switchable resonance in optically-controlled nested metamaterials at terahertz frequencies
Tunable and switchable resonance in optically-controlled nested metamaterials at terahertz frequencies
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太赫兹频率光控嵌套超材料中的可调谐和可切换谐振
DOI：
10.1142/s0217984916500111
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发表时间：
2016-01
影响因子：
1.9
通讯作者：
Yao, Jian-Quan
中科院分区：
文献类型：
--
作者：
Che, Yong-Li;Cao, Xiao-Long;Yao, Jian-Quan
在石英衬底上精心设计了由两个开环谐振器(SRR)和两个嵌入在两个SRR中的砷化镓(GaAs)岛组成的非对称嵌套异质结材料。基于不同的导电率，通过适当的光激励，实现了从半导体到金属状态的转变，数值模拟了其在太赫兹(THz)频率下的可调谐和可开关共振。在没有光激励的情况下，我们设计的超材料在监测的频率范围内有三个共振峰，它们分别位于0.813，1.269和1.722太赫兹。随着两个GaAs岛的电导率的增加，出现了不同的新共振，并不断增强。最后，产生了四个新的共振点，分别为0.432、0.948、1.578和1.875太赫兹。同时，超材料结构由原来的嵌套模式转变为新的整体模式。应用可逆变化的半导体电导率。
The asymmetrical nested metamaterial, composed of two split-ring resonators (SRRs) and two embedded gallium arsenide (GaAs) islands placed in the two SRRs, has been elaborately designed on quartz substrate. Its tunable and switchable resonances at terahertz (THz) frequencies are numerically demonstrated here based on different conductivities of GaAs, which can be transformed from semiconductor to metallic state through appropriate optical excitation. Without photoexcitation, our designed metamaterial has three resonance peaks in the range of monitored frequency range, and they are located at 0.813, 1.269 and 1.722 THz, respectively. As the conductivity of the two GaAs islands increases, different new resonances appear and constantly strengthen. Finally, four new resonant points are generated, at 0.432, 0.948, 1.578 and 1.875 THz, respectively. At the same time, the metamaterial structure is changed from the original nested mode to a new integral mode. Applying reversible changing conductivity of semicondu...
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影响因子：
3.7
作者：
Padilla, W. J.;Aronsson, M. T.;Averitt, R. D.
通讯作者：
Averitt, R. D.
影响因子：
7.5
作者：
Singh, Ranjan;Xiong, Jie;Chen, Hou-Tong
通讯作者：
Chen, Hou-Tong
影响因子：
3.8
作者：
Xinglin Wen;Qing Zhang;J. Chai;L. Wong;Shijie Wang;Q. Xiong
通讯作者：
Xinglin Wen;Qing Zhang;J. Chai;L. Wong;Shijie Wang;Q. Xiong
影响因子：
8.6
作者：
Smith, DR;Padilla, WJ;Schultz, S
通讯作者：
Schultz, S
基于石墨烯的可调谐超材料吸收体和太赫兹频率偏振调制
影响因子：
3.8
作者：
Zhang, Yin;Feng, Yijun;Jiang, Tian
通讯作者：
Jiang, Tian