2 research outputs found
Magnetic Control of the Chiroptical Plasmonic Surfaces
A major challenge
facing plasmon nanophotonics is the poor dynamic
tunability. A functional nanophotonic element would feature the real-time
sizable tunability of transmission, reflection of light’s intensity
or polarization over a broad range of wavelengths, and would be robust
and easy to integrate. Several approaches have been explored so far
including mechanical deformation, thermal, or refractive index effects,
and all-optical switching. Here we devise an ultrathin chiroptical
surface, built on two-dimensional nanoantennas, where the chiral light
transmission is controlled by the externally applied magnetic field.
The magnetic field-induced modulation of the far-field chiroptical
response with this surface exceeds 100% in the visible and near-infrared
spectral ranges, opening the route for nanometer-thin magnetoplasmonic
light-modulating surfaces tuned in real time and featuring a broad
spectral response
Designer Magnetoplasmonics with Nickel Nanoferromagnets
We introduce a new perspective on magnetoplasmonics in nickel nanoferromagnets by exploiting the phase tunability of the optical polarizability due to localized surface plasmons and simultaneous magneto-optical activity. We demonstrate how the concerted action of nanoplasmonics and magnetization can manipulate the sign of rotation of the reflected light’s polarization (i.e., to produce Kerr rotation reversal) in ferromagnetic nanomaterials and, further, how this effect can be dynamically controlled and employed to devise conceptually new schemes for biochemosensing