Diode-like asymmetric transmission of circularly polarized waves

Optical diode plays an important role in optical computing and information processing. In this paper, a kind of three-layered chiral metamaterial is proposed to achieve diode-like asymmetric transmission for forward and backward propagations of circularly polarized electromagnetic waves only. The me...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2014-07, Vol.116 (1), p.9-13
Main Authors: Liu, Dao-Ya, Yao, Li-Fang, Zhai, Xiao-Min, Li, Min-Hua, Dong, Jian-Feng
Format: Article
Language:English
Subjects:
Asymmetry
Characterization and Evaluation of Materials
Circularity
Condensed Matter Physics
Data processing
Diodes
Electromagnetic waves
Machines
Manufacturing
Mathematical models
Metamaterials
Nanotechnology
Optical and Electronic Materials
Physics
Physics and Astronomy
Processes
Rapid Communication
Surfaces and Interfaces
Thin Films
Wave propagation
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Summary:Optical diode plays an important role in optical computing and information processing. In this paper, a kind of three-layered chiral metamaterial is proposed to achieve diode-like asymmetric transmission for forward and backward propagations of circularly polarized electromagnetic waves only. The metamaterial is composed of a ring–chain structure sandwiched between two identical S-shaped metallic layers with their corresponding substrates. A transparent transmission at normal incidence in one direction and a small intensity of transmission in the opposite direction are numerically demonstrated in this chiral structure. Besides, the results reveal that the bandwidth of the cross-polarization transmission of this designed structure can be tuned by varying the incident angle of circularly polarized waves.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-014-8519-8