Terahertz wave polarization rotation with double layered metal grating of complimentary chiral patterns
Terahertz wave polarization rotation with double layered metal grating of complimentary chiral patterns
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DOI：
10.1364/oe.15.011117
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发表时间：
2007-09-03
期刊：
影响因子：
3.8
通讯作者：
Kuwata-Gonokami, M.
中科院分区：
文献类型：
--
作者：
Kanda, N.;Konishi, K.;Kuwata-Gonokami, M.
我们提出并证明了太赫兹（THz）电磁波的偏振旋转，通过使用二维光栅组成的两个位移层的金膜与互补的手征图案与四重对称。我们发展了一种基于三线栅偏振器的时域太赫兹偏振测量方法，并将旋光性与光学各向异性区分开来。我们得到了各向同性偏振旋转的太赫兹波的双折射的结构自由。结果表明，用薄金属膜制作的人工手征结构控制太赫兹偏振的可能性。(c)2007年，美国光学学会。
We propose and demonstrate polarization rotation of a terahertz (THz) electromagnetic wave by using two-dimensional gratings consisting of two displaced layers of gold film with complimentary chiral patterns with four-fold symmetry. We develop a time domain THz polarimetry method with three wire grid polarizers and distinguish optical activity from optical anisotropy. We obtain the isotropic polarization rotation of a terahertz wave free from the birefringence of the structures. Results indicate the possibility of controlling THz polarization with artificial chiral structures fabricated with thin metal films. (c) 2007 Optical Society of America.