A Polarizer Using Thin Metallic-Film Subwavelength Grating for Infrared to Terahertz Region

被引：29

作者：

Shiraishi, Kazuo ^{[1
]}

Oyama, Satoshi ^{[1
]}

Tsai, Chen S. ^{[2
,3
,4
]}

机构：

[1] Utsunomiya Univ, Grad Sch Engn, Utsunomiya, Tochigi 3218585, Japan

[2] Univ Calif Irvine, Dept Elect Engn & Comp Sci, Irvine, CA 92687 USA

[3] Univ Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92687 USA

[4] Natl Taiwan Univ, Inst Electroopt Engn, Taipei 115, Taiwan

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2011年 / 29卷 / 05期

关键词：

Gratings; optical components; optical polarization; thin films; OPTICAL-PROPERTIES; HIGH-PERFORMANCE; SURFACE; LIGHT; AL; FE; PB; NI; MO; AU;

D O I：

10.1109/JLT.2010.2103303

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A polarizer using a sinusoidal or triangular thin metallic-film subwavelength grating is proposed. The dependence of polarizer transmission characteristics on structural parameters of the grating was obtained numerically, and its potential for high performance was confirmed experimentally. The measured transmission loss for the TE-waves with a 25 nm-thick gold-film grating with a triangular profile was higher than 50 dB while the corresponding transmission loss for the TM-waves was lower than 1 dB in the frequency range of 1.0-2.5 THz. The metallic subwavelength grating structure has demonstrated its potential as a low-loss, high-extinction ratio, wide-aperture, and robust polarizer for the infrared and terahertz regions.

引用

页码：670 / 676

页数：7

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