纳米混合等离子体回音壁模式环形谐振器

a plasmonic whispering-gallery-mode cavity comprising of a semiconductor ring separated from a metal surface by a nanoscale dielectric gap is proposed and numerically investigated. The nanoscale ring resonator supports hybrid plasmonic modes with highly localized electromagnetic fields, featuring an ultra-small mode volume ～0.00129 μm3. The total quality factor is found to be limited by two mechanisms, the metal radiation loss and the absorption loss, and exhibits a tradeoff with the mode volume.