[21a-224A-1~10] 3.12 Nanoscale optical science and near-field optics

△ [21a-224A-6] Enhanced magneto-optical effect of Fe thin layer on Al nanocylinder array

〇(M1)Taisuke Atsumi¹, Shunsuke Murai¹, Koji Fujita¹, Katsuhisa Tanaka¹ (1.Kyoto Univ.)

Keywords:collective plasmonic mode, Faraday rotation, nanocylinder array

Al nanocylinder array was fabricated using nanoimprint lithography in combination with reactive ion etching (RIE). On this Al nanocylinder, a ferromagnetic Fe was deposited by electron-beam deposition. After Fe deposition, we measured the optical transmittance and Faraday rotation. At the wavelength where the optical diffraction in the plane of the array and LSPR excited simultaneously, the strong enhancement of Faraday rotation was observed. We simulated the transmittance by using finite element method (COMSOL Multiphysics) and investigated the mechanism of this enhanced Faraday rotation.