A Novel Method for PIT Effects Based on Plasmonic Decoupling

A Novel Method for PIT Effects Based on Plasmonic Decoupling
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基于等离子体解耦的 PIT 效应新方法

DOI:
10.1088/0256-307x/36/1/017801
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发表时间:
2019
影响因子:
3.5
通讯作者:
Jian-Qiang Liu
Jian-Qiang Liu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Bin Sun;Fei-Feng Xie;Shuai Kang;You-chang Yang;Jian-Qiang Liu

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石墨烯纳米带包覆金属纳米颗粒阵列构成的混合结构可以实现可调谐的双阻带THz光谱。双带光谱可以分别由纳米尺度宽度ww和石墨烯化学势μcμc控制。我们解释了在石墨烯带上激发的两个局部等离子体激元模属于不同的光栅,它们通过金属带的电磁屏蔽而彼此解耦。此外,等离子体激元诱导透明(PIT)效应也可以通过使两个传输陷波彼此靠近来实现,具有比基于等离子体激元耦合的PIT系统更好的性能,诸如具有更大的消光比和可调谐的透明窗口。
A tunable dual-band stop-band THz spectrum can be realized in a hybrid structure, which consists of metal nanoribbon arrays clad by graphene nanoribbons. Dual-band spectra can be controlled separately by the nanoribbon width ww and graphene chemical potential μcμc. We explain that two local plasmonic modes excited at graphene ribbons belong to different gratings, which uncouple with each other by electro-magnetic shielding of the metal ribbons. Furthermore, plasmonic induced transparent (PIT) effects can also be realized by making the two transmission notches close to each other, with better performance than the PIT system based on plasmonic coupling, such as with a larger extinction radio and a tunable transparency window.
金属/半导体界面的等离子体耦合
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