Hybrid long-range surface plasmon-polariton modes with tight field confinement guided by asymmetrical waveguides.
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.
Chen
Jianjun
J
State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China.
Li
Zhi
Z
Yue
Song
S
Gong
Qihuang
Q
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008904:Miniaturization; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*