2018/01/08 by B. C. Choi, H. Xu, Haitian Xu +4 · 2 citations
Engineering · Materials Science · #Plasmonic and Surface Plasmon Research #Gold and Silver Nanoparticles Synthesis and Applications #Nonlinear Optical Materials Studies
paper · doi:10.1063/1.5011980
The influence of the localized surface plasmon resonance on the magneto-optical Kerr effect (MOKE) was investigated in Ni80Fe20 thin films coated with gold nanorods. The nanorods are dimensionally tuned to support localized surface plasmon resonance near the incident laser frequency. A significant enhancement of magneto-optical response is observed, in which the MOKE signal is increased by over 40% compared to the reference Ni80Fe20 films. The spectral dependence of MOKE signals exhibits the maximum magneto-optical response centered around the longitudinal surface plasmon resonance wavelength of gold nanorods. Finite-difference time-domain modeling confirms that the excitation of the localized surface plasmons leads to the enhancement of magneto-optical responses.