Abstract

For glass slides covered by two-dimensional array of polystyrene spheres with Au nanocaps on the top surface, polar Kerr rotation ${\theta }_K$ peaks occur in the visible region and shift with the polystyrene sphere diameter. The ${\theta }_K$ spectra arise from the spectral properties of the transmission/reflectance ratio. The observed tunable magneto-optical behavior has potential applications in magneto-optical filters.

© 2012 Optical Society of America

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