Enhancement of switching speed by laser-induced clustering of nanoparticles in magnetic fluids

被引：38

作者：

Deng, Hai-Dong ^{[1
,2
]}

Liu, Jin ^{[1
]}

Zhao, Wei-Ren ^{[3
]}

Zhang, Wei ^{[3
]}

Lin, Xu-Sheng ^{[1
]}

Sun, Ting ^{[1
]}

Dai, Qiao-Feng ^{[1
]}

Wu, Li-Jun ^{[1
]}

Lan, Sheng ^{[1
]}

Gopal, Achanta Venu ^{[4
]}

机构：

[1] S China Normal Univ, Lab Photon Informat Technol, Sch Informat & Optoelect Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

[2] S China Agr Univ, Coll Sci, Guangzhou 510642, Guangdong, Peoples R China

[3] Guangdong Univ Technol, Coll Sci & Technol Engn, Guangzhou 510006, Guangdong, Peoples R China

[4] Tata Inst Fundamental Res, DCMP & MS, Bombay 400005, Maharashtra, India

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 23期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2942388

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The switching speed of magnetic fluids was investigated by using laser light of different power densities as well as incandescent light. It was found that the switching speed exhibited a strong dependence on incident power density and there existed an optimum value at which the fastest switching operation was achieved. In addition, it was revealed that the clustering of magnetic nanoparticles, which became resolved at large power densities, resulted in a rapid agglomeration of nanoparticles when a magnetic field was applied. It is suggested that the optical trapping force of the laser beam is responsible for the formation of clusters. (c) 2008 American Institute of Physics.

引用

页数：3

共 28 条

[1] Magnetic-fluid optical-fiber modulators via magnetic modulation [J].