We demonstrate experimentally refractive index sensing with localized Fano resonances in silicon oligomers, consisting of six disks surrounding a central one of slightly different diameter. Owing to the low absorption and narrow Fano-resonant spectral features appearing as a result of the interference of the modes of the outer and the central disks, we demonstrate refractive index sensitivity of more than 150 nm RIU−1 with a figure of merit of 3.8.
This article is part of the themed issue ‘New horizons for nanophotonics’.
One contribution of 15 to a theme issue ‘New horizons for nanophotonics’.
- Accepted October 5, 2016.
- © 2017 The Author(s)
Published by the Royal Society. All rights reserved.