Related Experiment Video
Updated: Dec 25, 2025

Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Localized Nanoresonator Mode in Plasmonic Microcavities
A Casalis de Pury1,2, X Zheng3, O S Ojambati1
1Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, JJ Thompson Avenue, Cambridge CB3 0HE, United Kingdom.
Abstract:
Submicron-thick hexagonal boron nitride crystals embedded in noble metals form planar Fabry-Perot half-microcavities. Depositing Au nanoparticles on top of these microcavities forms previously unidentified angle- and polarization-sensitive nanoresonator modes that are tightly laterally confined by the nanoparticle. Comparing dark-field scattering with reflection spectroscopies shows plasmonic and Fabry-Perot-like enhancements magnify subtle interference contributions, which lead to unexpected redshifts in the dark-field spectra, explained by the presence of these new modes.

