A planar chiral nanostructure with asymmetric transmission of linearly polarized wave and huge optical activity in near-infrared band

Just like an electronic diode that allows the electrical current to flow in one direction only, a kind of chiral metamaterial structure with a similar functionality for the electromagnetic wave is proposed. The designed nanostructure that consists of twisted metallic split-ring resonators on both si...

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Bibliographic Details
Published in:Chinese physics B 2013-12, Vol.22 (12), p.256-261
Main Author: 刘道亚 罗孝阳 刘锦景 董建峰
Format: Article
Language:English
Subjects:
Asymmetry
Computer simulation
Diodes
Electromagnetic waves
Electronics
Nanostructure
Optical activity
Wave propagation
Wavelengths
传输线
平面手性
数值模拟
旋光性
极化波
纳米结构
近红外波段
非对称
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Summary:Just like an electronic diode that allows the electrical current to flow in one direction only, a kind of chiral metamaterial structure with a similar functionality for the electromagnetic wave is proposed. The designed nanostructure that consists of twisted metallic split-ring resonators on both sides of a dielectric substrate achieves asymmetric transmission for a forward and backward propagating linearly polarized wave by numerical simulation in near-infrared band. Difference in transmission efficiency of the optimized structure between the same polarized waves incident from opposite directions can reach a maximum at the communication wavelength （1.55 μm）. Moreover, the simulation results of this structure also exhibit strong optical activity and circular dichroism.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/12/124202