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Terahertz wave polarization rotation in bianisotropic metamaterials |
Shi Yu-Lei(施宇蕾)†, Zhou Qing-Li(周庆莉), Liu Wei(刘维), Zhao Dong-Mei(赵冬梅), Li Lei(李磊), and Zhang Cun-Lin(张存林) |
Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics of Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048, China |
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Abstract Utilizing a polarization sensitive terahertz detection method where the detector is rotated by either 0° or 90° to measure the electric field Ep, s (t) of each polarization component, we have characterized the properties of split ring resonators. The strong polarization dependence of the bianisotropic-circular-current-driven and linear-polarization-induced resonances is in excellent agreement with the simulation when the p-polarized terahertz transmission is measured. However, these electromagnetic responses vanish when the s-polarized terahertz transmission is measured. There is only a transmission minimum at 1.64 THz and the terahertz polarization rotation angle of about 90° is observed. The polarized terahertz transmission amplitudes and spectra detected at orthogonal orientations show that these behaviours are probably attributed to the birefringent effect of the sample.
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Received: 04 March 2011
Revised: 03 April 2011
Accepted manuscript online:
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PACS:
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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78.20.Ek
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(Optical activity)
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42.25.Ja
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(Polarization)
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Cite this article:
Shi Yu-Lei(施宇蕾), Zhou Qing-Li(周庆莉), Liu Wei(刘维), Zhao Dong-Mei(赵冬梅), Li Lei(李磊), and Zhang Cun-Lin(张存林) Terahertz wave polarization rotation in bianisotropic metamaterials 2011 Chin. Phys. B 20 094102
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