Optical Negative Refraction in Ferrofluids with Magnetocontrollability

被引：94
|
作者：
Gao, Y. [1 ,2 ,3 ,4 ]
Huang, J. P. [1 ,2 ]
Liu, Y. M. [5 ]
Gao, L. [6 ]
Yu, K. W. [3 ,4 ]
Zhang, X. [5 ]
机构：
[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
[2] Fudan Univ, Surface Phys Lab, Natl Key Lab, Shanghai 200433, Peoples R China
[3] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
[4] Chinese Univ Hong Kong, Inst Theoret Phys, Shatin, Hong Kong, Peoples R China
[5] Univ Calif Berkeley, NSF, NSEC, Berkeley, CA 94720 USA
[6] Soochow Univ, Dept Phys, Suzhou 215006, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 03期
关键词：
NANOWIRES;
D O I：
10.1103/PhysRevLett.104.034501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We numerically demonstrate optical negative refraction in ferrofluids containing isotropic Fe3O4 nanoparticles, each having an isotropic Ag shell, in the presence of an external dc magnetic field H. The all-angle broadband optical negative refraction with magnetocontrollability arises from H-induced chains or columns. They result in hyperbolic equifrequency contour for transverse magnetic waves propagating in the system. The finite element simulations verify the analyses using the effective medium approximation. Experimental demonstration and potential applications are suggested and discussed.
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页数：4
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