Photonic-crystal resonant effect using self-assembly ordered structures in magnetic fluid films under external magnetic fields

被引：20

作者：

Yang, S. Y.

Horng, H. E. ^{[1
]}

Shiao, Y. T.

Hong, Chin-Yih

Yang, H. C.

机构：

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

[2] Da Yeh Univ, Dept Mech & Automat Engn, Changhua 515, Taiwan

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

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 307卷 / 01期

关键词：

photonic crystals; magnetic fluids; resonant modes;

D O I：

10.1016/j.jmmm.2006.03.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

When an external magnetic field is applied perpendicularly to a magnetic fluid film, a self-assembly hexagonal ordered structure is formed in the film when the field exceeds a certain strength. The period of the ordered structure can be manipulated from several micrometers down to sub-micrometers by increasing the field strength or reducing the film thickness. By injecting a light propagating along the in-plane direction of the film, photonic-crystal band gaps can be observed. With the tunability of the ordered structure, the forbidden photonic bands can be adjusted by varying the external field strength. It was further found that resonant modes are generated when a point defect is artificially implanted into the self-assembly ordered structure in the magnetic fluid film. These results reveal that the self-assembly ordered structure in a magnetic fluid film under external magnetic fields acts as a photonic crystal. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：43 / 47

页数：5

共 35 条

[1] A PERFECTLY MATCHED LAYER FOR THE ABSORPTION OF ELECTROMAGNETIC-WAVES [J].