Plasmonic and magnetic effects accompanying optical second-harmonic generation in Au/Co/Au nanodisks
T. V. Murzina, I. A. Kolmychek, A. A. Nikulin, E. A. Gan'shina, О. А. Aktsipetrov
Department of Physics, Moscow State University, 119992 Moscow, Russia
PACS: 42.65.-k, 75.50.-y
Abstract
Optical second-harmonic (SH) generation in Au/Co/Au sandwich-like
nanodisks is studied, using several experimental techniques, at SH frequency
being close to that of the plasmon resonance in the system. The dependences
of the relative amplitude and phase of the magnetization-induced SH component
on the angle of incidence are found to significantly differ from those
measured for a continuous Au/Co/Au trilayer film. A phenomenological
description of the observed effects is proposed, with special emphasis on
resonant excitation of the local plasmon modes by the nonlinear sources
induced in the nanodisks.