Tunable Magneto-Optical Kerr Effect in Fe Films Underneath a Two-Dimensional Array of Polystyrene Spheres Covered by Au Nanocaps
ZHANG Xia1, SHI Lei1, LI Jing2, XIA Yun-Jie3, SHI Zhong4, ZHOU Shi-Ming1,4**
1Surface Physics State Laboratory and Department of Physics, Fudan University, Shanghai 200433 2Department of Optical Science and Engineering, Fudan University, Shanghai 200433 3Shandong Province Key Lab of Laser Polarization and Information, Qufu Normal University, Qufu 273165 4School of Physics Science and Engineering, Tongji University, Shanghai 200092
Abstract：For Fe layers covered by two-dimensional arrays of hexagonal close-packed polystyrene spheres which are hemispherically covered by Au films on the top, fine structures are observed in reflection, magneto-optical Kerr rotation and ellipticity spectra. The Kerr rotation achieves peaks or exhibits a narrow resonance-like spectral lineshape near the reflection minima, depending on the mechanism of the reflection dips. The Kerr rotation peaks and the resonance-like lineshape both are shifted with the sphere diameters. These phenomena can be attributed to the excitation of surface plasmon resonance and Fabry–Pérot modes.
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
引用本文:
. [J]. Chin. Phys. Lett., 2013, 30(3): 37801-037801.
ZHANG Xia, SHI Lei, LI Jing, XIA Yun-Jie, SHI Zhong, ZHOU Shi-Ming. Tunable Magneto-Optical Kerr Effect in Fe Films Underneath a Two-Dimensional Array of Polystyrene Spheres Covered by Au Nanocaps. Chin. Phys. Lett., 2013, 30(3): 37801-037801.
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2013, Vol. 30 
