Magnetic Control of the Chiroptical Plasmonic Surfaces

Nano Lett. 2018 Jan 10;18(1):302-307. doi: 10.1021/acs.nanolett.7b04139. Epub 2017 Dec 26.


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.

Keywords: 2D nanoantennas; Chiroptics; active tuning; magnetoplasmonics.

Publication types

  • Research Support, Non-U.S. Gov't