Simultaneous identification of the low-field-induced tiny variation of complex refractive index for anisotropic and opaque magnetic-fluid thin film by a stable heterodyne Mach-Zehnder interferometer

被引：7

作者：

Hong, Chin-Yih ^{[2
]}

Chieh, Jen-Jie ^{[1
]}

Yang, Shieh-Yueh ^{[1
]}

Yang, Hong-Chang ^{[3
]}

Horng, Herng-Er ^{[1
]}

机构：

[1] Natl Taiwan Normal Univ, Inst Electroopt Sci & Technol, Taipei 116, Taiwan

[2] Natl Chung Hsing Univ, Grad Inst Biomed Engn, Taichung 402, Taiwan

[3] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

来源：

APPLIED OPTICS | 2009年 / 48卷 / 29期

关键词：

BIREFRINGENT; WAVELENGTH; MATRIX;

D O I：

10.1364/AO.48.005604

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We use a heterodyne Mach-Zehnder interferometer to simultaneously and simply measure the complex refractive index by only normal incidence on the specimen, instead of using a complicated measurement procedure or instrument that only measures the real or imaginary part of the complex refractive index. To study the tiny variation of the complex refractive index, the small complex refractive-index variation of a rare-concentration magnetic-fluid thin film, due to a weak field of less than 200 Oe, was processed by this interferometer. We also present the wavelength trend of the complex refractive index of magnetic fluids to verify the appearance of the slight change in a small wavelength range. (C) 2009 Optical Society of America

引用

页码：5604 / 5611

页数：8