Circularly polarized plasmon modes in spheroidal nanoshells for applications to all-optical magnetic recording

Hung, L.; Lang, G.; McAvoy, P.; Krafft, C.; Mayergoyz, I.D.

doi:10.1063/1.3672071

Cited by 2 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2(a). Depending on the helicity of the incident light, the Lorenz force either adds to or subtracts from the centripetal force that is exerted by the electric field, which alters the confinement of electrons [18][19][20]. Therefore, the degeneracy of circular plasmon modes is lifted by the perpendicular magnetization of the nickel nanoparticles.…”

Section: Optical Extinction and MCD Measurementsmentioning

confidence: 99%

Magnetic circular dichroism of non-local surface lattice resonances in magnetic nanoparticle arrays

2016

View full text Add to dashboard Cite

Subwavelength metallic particles support plasmon resonances that allow extreme confinement of light down to the nanoscale. Irradiation with left- and right hand circularly polarized light results in the excitation of circular plasmon modes with opposite helicity. The Lorenz force lifts the degeneracy of the two modes in magnetic nanoparticles. Consequently, the confinement and frequency of localized surface plasmon resonances can be tuned by an external magnetic field. In this paper, we experimentally demonstrate this effect for nickel nanoparticles using magnetic circular dichroism (MCD). Besides, we show that non-local surface lattice resonances in periodic arrays of the same nanoparticles significantly enhance the MCD signal. A numerical model based on the modified long wavelength approximation is used to reproduce the main features in the experimental spectra and provide design rules for large MCD effects in sensing applications.

show abstract

Section: Optical Extinction and MCD Measurementsmentioning

confidence: 99%