Magnetoplasmonic crystals based on commercial digital discs

Abstract

Transversal magneto-optical Kerr effect (TKE) controlled by surface plasmon-polariton resonances is studied in nickel and combined silver/nickel magnetoplasmonic crystals fabricated on the base of commercial digital discs with periods of 320 nm, 740 nm, and 1500 nm. Wood's anomaly is observed in visible and near IR spectral ranges due to fulfilment of phase-matching conditions between surface plasmons and −1, −2, and +1 diffraction orders for the samples with these periods, respectively. Strong asymmetrical Fano-shape resonances are observed in TKE spectra in the vicinity of surface plasmons' resonances.