Journal
OPTICS COMMUNICATIONS
Volume 338, Issue -, Pages 416-421Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2014.11.010
Keywords
Ultra-broadband; Polarization rotator; Metamaterial
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Funding
- National Natural Science Foundation of China [41474117]
- Special Funds for Development Scientific Research Unit Projects of Wuhan, China [2013131004]
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A three-layer bi-anisotropic metamaterial (B-AM) is proposed to realize a 900 polarization rotator in an ultra-broadband frequency range of 5.8-11.8 GHz, which can convert the linearly polarized wave into its cross-polarized wave for propagating directions. Simulated and measured results show that the ratio of polarization conversion (PCR) of the three-layer B-AM is nearly 90% and FWHM is more than 68%. In addition, the three-layer B-AM can achieve asymmetric transmission (AT) for forward and backward propagations of linearly polarized waves. The proposed three-layer B-AM has simple geometry and wider operating frequency bands comparing to the previous designs. The physical mechanism of the ultra-broadband linear polarization conversion effect is illustrated by simulated surface current distributions of the structure. (C) 2014 Elsevier B.V. All rights reserved.
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