Magnetically-modulated refractive index of magnetic fluid films | Zendy

ShiehYueh Yang | Zendy; Y. F. Chen | Zendy; H. E. Horng | Zendy; ChinYih Hong | Zendy; W. S. Tse | Zendy; H. C. Yang | Zendy

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Magnetically-modulated refractive index of magnetic fluid films

Author(s) -

ShiehYueh Yang,

Y. F. Chen,

H. E. Horng,

ChinYih Hong,

W. S. Tse,

H. C. Yang

Publication year - 2002

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1531831

Subject(s) - refractive index , magnetic field , materials science , optics , step index profile , ferrofluid , condensed matter physics , optical fiber , physics , optoelectronics , graded index fiber , fiber optic sensor , quantum mechanics

We developed a setup to probe the refractive index of the magnetic fluid films under external magnetic fields. This setup possesses a high resolution of 0.0001 in the measured refractive index. It was found that the refractive index of the magnetic fluid depends linearly on the concentration of the dilute magnetic fluid under zero field. For a given magnetic fluid film, the refractive index increases with the increasing field strength over a critical value, and then becomes saturated as the field reaches around 200 Oe. It is noteworthy that the magnetically modulated refractive index of the magnetic fluid films could have great potential in electro-optical applications.

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