Ultralow-Intensity Magneto-Optical and Mechanical Effects in Metal Nanocolloids

作者：Moocarme M; Dominguez Juarez J L; Vuong L T^*

来源：Nano Letters, 2014, 14(3): 1178-1183.

DOI：10.1021/nl4039357

• Magneto-optics
• plasmonics
• self-assembly
• nanocolloids
• inverse Faraday effect
• light scattering

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.

• 出版日期2014-3