Terahertz laminated-structure polarizer with high extinction ratio and transmission power
Terahertz laminated-structure polarizer with high extinction ratio and transmission power
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DOI：
10.7567/apex.8.032201
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发表时间：
2015-02
影响因子：
2.3
通讯作者：
Yudai Kishi;M. Nagai;John C. Young;K. Takano;M. Hangyo;Takehito Suzuki
中科院分区：
文献类型：
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作者：
Yudai Kishi;M. Nagai;John C. Young;K. Takano;M. Hangyo;Takehito Suzuki
提出了一种在聚合物薄膜上叠层金属狭缝阵列的太赫兹偏振器。在这里，有效地进行迭代设计与模式匹配的方法，所提出的偏振器的特性被证明是上级那些传统的偏振器。为了验证所提出的设计，铜金属狭缝阵列上的环烯烃聚合物薄膜溅射和冲压制造。测量证实了高消光比，在0.28至1.09 THz范围内低于−50 dB，在0.2至1.98 THz范围内低于−40 dB，TM模式传输功率在0.2至1.95 THz范围内平均为76%。
A terahertz polarizer consisting of a laminated metal-slit array on a polymer film is presented. Here, the iterative design is efficiently performed with a mode-matching method; the proposed polarizer’s characteristics are shown to be superior to those of conventional polarizers. To verify the proposed design, a copper metal-slit array was fabricated on a cyclo-olefin polymer film by sputtering and punching. Measurements confirm a high extinction ratio, below −50 dB from 0.28 to 1.09 THz and below −40 dB from 0.2 to 1.98 THz, with a TM-mode transmission power that averages 76% from 0.2 to 1.95 THz.