title: Vertical plasmonic resonant nanocavities.
abstract: We demonstrate plasmonic modes in a vertical nanocavity with an air output window at the top surface and Ag reflectors. The resonances of surface plasmon polaritons are investigated using cathodoluminescence spectroscopy. The resonant modes are determined by comparing experiment and theoretical simulations. The plasmon dispersion relation in the vertical nanocavities shows a strong confinement to the electromagnetic field, and the smallest modal volume is only 0.0014 μm(3). Our work provides insights into the development of nanoscale plasmonic vertical cavity surface-emitting lasers.
authors.affiliation: State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University , Beijing 100871, People's Republic of China.
authors.forename: Xinli
authors.initials: X
authors.lastname: Zhu
authors.forename: Jiasen
authors.initials: J
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Dapeng
authors.initials: D
authors.lastname: Yu