期刊
OPTICS EXPRESS
卷 22, 期 21, 页码 25679-25688出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.025679
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资金
- National Science Foundation of China [61201083, U1231201]
- China Postdoctoral Science Foundation [2012M511171, 2013T60487]
- Special Foundation for Harbin Young Scientists [2012RFLXG030]
- Fundamental Research Funds for the Central Universities
- 111 Project [B13015]
We propose a kind of planar chiral optical metamaterial consisting of two layers of connected I-shape resonators arranged by a twist angle of 90 degrees. Numerical simulation results demonstrate that our scheme can realize a mutual polarization conversion and dual-band asymmetric transmission for linearly polarized waves in the optical regime. For the forward propagation, the x-to-y and y-to-x polarization conversions in the proposed bilayered metamaterial result from the concentric and eccentric C-shaped dimers, respectively. The current distributions of bilayered metamaterials at the resonant frequencies are presented to interpret the dual-band asymmetric transmission. The polarization conversion efficiency and resonant frequencies can be modified via parametric study. (C) 2014 Optical Society of America
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