Terahertz wire-grid polarizers with micrometer-pitch Al gratings
Terahertz wire-grid polarizers with micrometer-pitch Al gratings
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DOI：
10.1364/ol.34.000274
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发表时间：
2009-02-01
期刊：
影响因子：
3.6
通讯作者：
Watanabe, Wataru
中科院分区：
文献类型：
--
作者：
Yamada, Itsunari;Takano, Keisuke;Watanabe, Wataru
我们通过光刻和湿法刻蚀在硅基板上制造了由微米间距铝光栅组成的太赫兹线栅偏振器。 TM和TE透射率之比（消光比）在0.5 THz处超过35 dB。在Si衬底的布儒斯特角下，TM波通过所制作的偏振片的偏振透过率超过95%，在接近1 THz时消光比超过45 dB。所制造的偏振器比传统的独立式太赫兹线栅偏振器具有更高的消光比。 (C) 2009 美国光学学会
We fabricated a terahertz wire-grid polarizer consisting of a micrometer-pitch Al grating on a Si substrate by photolithography and wet etching. The ratio of TM and TE transmittances (extinction ratio) was over 35 dB at 0.5 THz. At the Brewster angle of the Si substrate, the polarization transmittance of a TM wave through the fabricated polarizer exceeded 95% and the extinction ratio was over 45 dB at similar to 1 THz. The fabricated polarizer has a higher extinction ratio than conventional free-standing terahertz wire-grid polarizers. (C) 2009 Optical Society of America