Terahertz wave polarization rotation in bianisotropic metamaterials

Utilizing a polarization sensitive terahertz detection method where the detector is rotated by either 0° or 90°to measure the electric field Ep,8 （t） of each polarization component, we have characterized the properties of split ring res- onators. The strong polarization dependence of the bianisotrop...

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Bibliographic Details
Published inChinese physics B Vol. 20; no. 9; pp. 182 - 186
Main Author 施宇蕾 周庆莉 刘维 赵冬梅 李磊 张存林
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.09.2011
Subjects
Amplitudes
Electric fields
Metamaterials
Orientation
Polarization
Resonators
Simulation
Spectra
介质
传输测量
偏振旋转
双各向异性
双折射效应
太赫兹波
电流驱动
线性偏振
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/20/9/094102

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Summary:Utilizing a polarization sensitive terahertz detection method where the detector is rotated by either 0° or 90°to measure the electric field Ep,8 （t） of each polarization component, we have characterized the properties of split ring res- onators. 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. How- ever, 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.
Bibliography:Shi Yu-Lei Zhou Qing-Li Liu Wei Zhao Dong-Mei Li Lei and Zhang Cun-Lin 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
terahertz, metamaterials, birefringent effect, bianisotropic effect
Utilizing a polarization sensitive terahertz detection method where the detector is rotated by either 0° or 90°to measure the electric field Ep,8 （t） of each polarization component, we have characterized the properties of split ring res- onators. 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. How- ever, 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.
11-5639/O4
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ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/20/9/094102