title: Tailoring of high-Q-factor surface plasmon modes on silver microtubes.
abstract: We investigate the excitation of surface plasmon polaritons on silver tubes with finite-difference time-domain simulations. These surface plasmon polaritons exhibit azimuthal whispering gallery modes with quality factors in the hundreds. We show that the high quality factors arise from the coupling of the surface plasmon modes to photonic modes inside the tube. We examine the influence of a gain material on the quality factors and find that for material data of rhodamine 6G, the quality factors are enhanced significantly up to values of 3000.
authors.affiliation: Institut für Angewandte Physik und Mikrostrukturforschungszentrum, Universität Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany. arottler@physnet.uni‐hamburg.de
authors.forename: Andreas
authors.initials: A
authors.lastname: Rottler
authors.forename: Markus
authors.initials: M
authors.lastname: Bröll
authors.forename: Stephan
authors.initials: S
authors.lastname: Schwaiger
authors.forename: Detlef
authors.initials: D
authors.lastname: Heitmann
authors.forename: Stefan
authors.initials: S
authors.lastname: Mendach