Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 116, Issue 1, Pages 9-13Publisher
SPRINGER
DOI: 10.1007/s00339-014-8519-8
Keywords
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Funding
- National Natural Science Foundation of China [61078060]
- Ningbo Optoelectronic Materials and Devices Creative Team [2009B21007]
- Outstanding (Postgraduate) Dissertation Growth Foundation of Ningbo University [PY2013012]
- Scientific Research Foundation of Graduate School of Ningbo University [G14064]
- K. C. Wong Magna Fund in Ningbo University
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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.
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