Near-field magneto-optical microscopy using surface-plasmon waves and the transverse magneto-optical Kerr effect

被引：0
|
作者：
Wei, Pei-Kuen [1 ]
Chou, Hsieh-Li [1 ]
Cheng, You-Ren [1 ]
Yao, Yung-Der [2 ]
机构：
[1] Research Center for Applied Sciences, Academia Sinica, Nankang, Taipei, Taiwan
[2] Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan
来源：
Journal of Applied Physics | 2005年 / 98卷 / 09期
关键词：
Finite difference method - Magnetic films - Thin films - Time domain analysis;
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摘要：
This research investigates the propagation behavior of the optical near field between gold-coated tapered fiber tips and magnetic thin films. From three-dimensional finite-difference time-domain calculations, we verified that p -polarized incident light generated a strong longitudinal electric field in the fiber tip. This longitudinal electric field can propagate in the nanogap with the aid of surface-plasmon waves. The surface-plasmon wave and the transverse magneto-optical Kerr effect were used in near-field microscopy to measure the magnetic images of submicron Ni-Fe dot arrays. Changes of magnetic domains under different external magnetic fields were experimentally verified by near-field magneto-optical microscopy. © 2005 American Institute of Physics.
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