Optical tuning of dielectric properties of Ba0.6Sr0.4TiO3-La(Mg0.5Ti0.5)O3 ceramics in the terahertz range

被引：24

作者：

Wu, Liang ^{[1
,2
]}

Jiang, Linkun ^{[1
,2
]}

Xu, Yebin ^{[3
]}

Ding, Xin ^{[1
,2
]}

Yao, Jianquan ^{[1
,2
]}

机构：

[1] Tianjin Univ, Inst Laser & Optoelect, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Key Lab Optoelect Informat Technol, Educ Minist, Tianjin 300072, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Hubei, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 19期

基金：

中国国家自然科学基金;

关键词：

FERROELECTRIC MATERIALS; VOLTAGE;

D O I：

10.1063/1.4829479

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dielectric properties of 0.4Ba(0.6)Sr(0.4)TiO(3)-0.6La(Mg0.5Ti0.5)O-3 ceramics and their tunability under external optical fields are investigated at room temperature by means of terahertz time-domain spectroscopy. Application of the optical field leads to an appreciable tuning of the permittivity, which reaches up to 16%. Meanwhile, the dielectric loss changes about 21%. From the results, we find that the change of refractive index has a linear relationship on scale with the applied light power. These findings are attributed to the internal space charge field in the ceramic caused by the excited free carriers. (c) 2013 AIP Publishing LLC.

引用

页数：4

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