Tunable polar Kerr rotation spectra of glass slides by coating two-dimensional polystyrene sphere array with Au nanocaps

摘要

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.