[23p-E303-1~15] 3.12 Nanoscale optical science and near-field optics

[23p-E303-8] Magneto-Plasmonic Activities in CoPt Perpendicular Magnetic Films

〇Haruki Yamane¹, Satoshi Yanase¹, Takashi Hasegawa², Masanobu Kobayashi³, Yukiko Yasukawa³ (1.Akita Ind. Tech., 2.Akita Univ., 3.Chiba Inst. Tech.)

Keywords:plasmon, magneto-optics, perpendicular magnetic

Magneto-plasmonic phenomena in CoPt perpendicular magnetic films were investigated in polar Kerr excitation geometry. The surface plasmon resonances (SPRs) markedly enhanced the magneto-optical (MO) Kerr rotation angle. Moreover, the reflective intensity was drastically modulated by applying an external magnetic field at the SPR condition. The change in reflective intensity is attributed to an MO interference effect produced by the subwavelength magnetic domain structure.