Journal
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
Volume 26, Issue 14-15, Pages 1967-1976Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09205071.2012.723673
Keywords
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Funding
- National Natural Science Foundation of China [50872113, 50936002]
- Northwestern Polytechnical University Foundation for Basic Research [JC201154]
- Australian Research Council [DP110100713]
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We present a novel planar chiral metamaterial (CMM) that can realize the intriguing phenomenon of 90 degrees-polarization rotation to the electromagnetic wave incidence with a linear polarization. This CMM consists of fourfold-symmetrically conjugated metallic pairs, which exhibits a circular dichroism and a giant optical activity. The fascinating 90 degrees-polarization rotation of electromagnetic wave for a wide angle of incidence is demonstrated by both simulations and experiments. To be specific, the rotation angle per wavelength in our design is as large as 3400 degrees/lambda, implying that the chirality is significantly stronger than any other planar CMMs reported previously. Due to the giant chirality, the negative refractive index is achieved for circularly polarized waves.
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