Localized Nanoresonator Mode in Plasmonic Microcavities

de Pury, A Casalis; Zheng, X; Ojambati, OS; Trifonov, A; Grosse, C; Kleemann, M-E; Babenko, V; Purdie, D; Taniguchi, T; Watanabe, K; Lombardo, A; Vandenbosch, GAE; Hofmann, S; Baumberg, JJ

doi:10.1103/PhysRevLett.124.093901

Localized Nanoresonator Mode in Plasmonic Microcavities

Author:

de Pury, A Casalis

Zheng, X ; Ojambati, OS ; Trifonov, A ; Grosse, C ; Kleemann, M-E ; Babenko, V ; Purdie, D ; Taniguchi, T ; Watanabe, K ; Lombardo, A ; Vandenbosch, GAE ; Hofmann, S ; Baumberg, JJ

Keywords:

Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, MOS2, NANOSTRUCTURES, NANOROD, SPHERES, C14/19/083#55221595, 01 Mathematical Sciences, 02 Physical Sciences, 09 Engineering, General Physics, 40 Engineering, 49 Mathematical sciences, 51 Physical sciences

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.