title: Ultralow-intensity magneto-optical and mechanical effects in metal nanocolloids.
abstract: Magneto-plasmonics is a designation generally associated with ferromagnetic-plasmonic materials because such optical responses from nonmagnetic materials alone are considered weak. Here, we show that there exists a switching transition between linear and nonlinear magneto-optical behaviors in noble-metal nanocolloids that is observable at ultralow illumination intensities and direct current magnetic fields. The response is attributed to polarization-dependent nonzero-time-averaged plasmonic loops, vortex power flows, and nanoparticle magnetization. This work identifies significant mechanical effects that subsequently exist via magnetic-dipole interactions.
authors.affiliation: Physics Department, The Graduate Center of CUNY , 365 Fifth Avenue, New York, New York 10016, United States.
authors.forename: M
authors.initials: M
authors.lastname: Moocarme
authors.forename: J L
authors.initials: JL
authors.lastname: Domínguez-Juárez
authors.forename: L T
authors.initials: LT
authors.lastname: Vuong