Dynamically tunable multi-channel and polarization-independent electromagnetically induced transparency in terahertz metasurfaces

被引:17
|
作者
Ren, Kun [1 ]
He, Yumeng [1 ]
Ren, Xiaobin [2 ]
Zhang, Ying [1 ]
Han, Qun [1 ]
Wang, Liedong [1 ]
Xu, Maojun [1 ]
机构
[1] Minist Educ, Coll Precis Instrument & Optoelect Engn, Key Lab Optoelect Informat Technol, Tianjin 300072, Peoples R China
[2] Tianjin Univ Sci & Technol, Sch Sci, Tianjin 300222, Peoples R China
关键词
electromagnetic induced transparency; multi-channel EIT; polarization independent; photosensitive silicon; active control; PLASMON-INDUCED TRANSPARENCY; PLANAR METAMATERIAL; ACTIVE CONTROL; GRAPHENE; ANALOG; BRIGHT;
D O I
10.1088/1361-6463/ab60ed
中图分类号
O59 [应用物理学];
学科分类号
摘要
Switchable multi-channel electromagnetic induced transparency (EIT) is achieved in designed terahertz metasurfaces. The underlying physics of the EIT effect is analyzed. The influence of structure parameters on the EIT effect is investigated. A metasurface with a symmetrical unit cell is proposed, by which polarization-independent EIT is achieved. In addition, photosensitive silicon is integrated into the metal layer aiming for active modulation. Tunable EIT with adjustable peak frequency and amplitude is obtained. Moreover, the dynamic control is not limited to a single EIT transparency window. We show that the number of EIT transparency windows can be tailored, and switchable multi-channel EIT are successively realized. The results would provide significant guidance in multifunctional active devices, such as modulators and switches in nanophotonics optics.
引用
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页数:7
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