Tunable optical and magneto-optical properties of ferrofluid in the terahertz regime

被引：38

作者：

Chen, Sai ^{[1
]}

Fan, Fei ^{[1
]}

Chang, Shengjiang ^{[1
,2
]}

Miao, Yinping

Chen, Meng ^{[1
]}

Li, Jining ^{[1
]}

Wang, Xianghui ^{[1
]}

Lin, Lie ^{[1
]}

机构：

[1] Nankai Univ, Inst Modern Opt, Key Lab Opt Informat Sci & Technol, Minist Educ, Tianjin 300071, Peoples R China

[2] Tianjin Univ Technol, Sch Elect Informat Engn, Tianjin Key Lab Film Elect & Communicate Devices, Tianjin 300384, Peoples R China

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 06期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

MAGNETIC FLUID; PHASE-SHIFTER; CRYSTAL; TRANSMISSION;

D O I：

10.1364/OE.22.006313

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The dielectric property and magneto-optical effects of ferrofluids have been investigated in the terahertz (THz) regime by using THz time-domain spectroscopy. The experiment results show that the refractive index and absorption coefficient of ferrofluid for THz waves rise up with the increase of nanoparticle concentration in the ferrofluid. Moreover, two different THz magneto-optical effects have been found with different external magnetic fields, of which mechanisms have been theoretically explained well by microscopic structure induced refractive index change in the magnetization process and the transverse magneto-optical effect after the saturation magnetization, respectively. This work suggests that ferrofluid is a promising magneto-optical material in the THz regime which has widely potential applications in THz functional devices for THz sensing, modulation, phase retardation, and polarization control. (C) 2014 Optical Society of America

引用

页码：6313 / 6321

页数：9

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