Optically controlled background-free terahertz switching in chiral metamaterial

被引：80

作者：

Lv, T. T. ^{[1
]}

Zhu, Z. ^{[1
]}

Shi, J. H. ^{[1
,2
]}

Guan, C. Y. ^{[1
]}

Wang, Z. P. ^{[1
]}

Cui, T. J. ^{[2
]}

机构：

[1] Harbin Engn Univ, Coll Sci, Minist Educ, Key Lab In Fiber Integrated Opt, Harbin 150001, Peoples R China

[2] Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China

来源：

OPTICS LETTERS | 2014年 / 39卷 / 10期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Metamaterials - Optical pumping - Wave propagation - Polarization;

D O I：

10.1364/OL.39.003066

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a multiband background-free terahertz (THz) switch in photoactive chiral metamaterial using polarization conversion. Orthogonal arrangement of two asymmetrical split-ring apertures allows a high polarization conversion efficiency and low copolarization transmission. The chiral metamaterial embedded with photoactive silicon promises a dynamic control on cross-polarization transmission and thus enables an efficient background-free THz switch. The on/off state of THz metamaterial switching can be efficiently controlled by an optical pump. The realization of a cross-polarization THz switch provides a new mechanism of mode switching to control THz wave propagation and will be a promising candidate for polarization devices. (C) 2014 Optical Society of America

引用

页码：3066 / 3069

页数：4

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