Journal
NANO LETTERS
Volume 14, Issue 3, Pages 1178-1183Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl4039357
Keywords
Magneto-optics; plasmonics; self-assembly; nanocolloids; inverse Faraday effect; light scattering
Categories
Funding
- NSF [DMR-1151783]
- PSC-CUNY [65785-00 43]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1151783] Funding Source: National Science Foundation
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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.
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