Spectroscopy of magnetization-induced second-harmonic generation (MSHG) is studied in magnetic CoxAg1−x granular films containing Co nanoparticles. A strong resonance of the magnetic contrast of the second-harmonic generation (SHG) intensity is observed in the two-photon energy range from 3,8 eV to 4,5 eV. The local surface plasmons exited in magnetic Co nanogranules in this spectral range assist MSHG and are responsible for a significant enhancement of the SHG magnetic contrast due to the resonances of local optical fields.
@article{arxiv.nlin/0609010,
title = {Magnetization-induced optical second-harmonic generation and local surface plasmons in magnetic $Co_x Ag_{1-x}$ nanogranular films},
author = {E. M. Kim and T. V. Murzina and A. F. Kravets and M. Inoue and G. Marowsky and O. A. Aktsipetrov},
journal= {arXiv preprint arXiv:nlin/0609010},
year = {2007}
}