Open AccessHybrid long-range surface plasmon-polariton modes with tight field confinement guided by asymmetrical waveguides
Author(s) -
Jianjun Chen,
Zhi Li,
Song Yue,
Qihuang Gong
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.023603
Subject(s) - surface plasmon polariton , plasmon , waveguide , surface plasmon , optics , materials science , whispering gallery wave , dielectric , optoelectronics , polariton , wavelength , resonator , physics
A finite width dielectric-metal-dielectric (DMD) waveguide placed on a substrate is numerically investigated near the telecom wavelength lambda = 1550 nm by the finite element method. With proper waveguide sizes, the asymmetrical DMD waveguide can support hybrid long-range surface plasmon-polariton modes which have tight field confinement (approximately 700 nm) and long propagation lengths (L> 300 microm) simultaneously. Compact plasmonic waveguide-ring resonators (WRRs) based on such asymmetrical DMD waveguide show high quality factors compared with dielectric-loaded surface plasmon-polariton, channel plasmon polariton, plasmonic whispering-gallery microcavity, and pure dielectric waveguide cases.