Hybridization of Gap Modes and Lattice Modes in a Plasmonic Resonator Array with a Metal–Insulator–Metal Structure

• DOI: 10.1021/acsphotonics.9b00977
• Publication Date: 2019-10-28T17:16:16Z
• Authors: Hikaru Saito; Daichi Yoshimoto; Hugo Lourenco-Mar...; Naoki Yamamoto; Takumi Sannomiya
• Keywords: Cathodoluminescence; Lattice (music)

Plasmonic resonator arrays have attracted a great interest as platform to enhance light–matter interaction and been examined for their applicability various types of optical devices, such sensors, light emitter, photocatalyst, name few. In plasmonic array, localized propagating plasmon modes can hybridize, which is known result in an anticrossing the bands dispersion curves. However, it was so far unclear how modal symmetry affects hybridization, especially when occurs at specific reciprocal lattice point with high degree symmetry, example, Γ point. this work, we used momentum-resolved cathodoluminescence-scanning transmission electron microscopy comprehensively characterize hybridization Our study reveals theoretically experimentally existence mode selection rules that specify hybrid pairs mode.