Open AccessLong range hybrid tube-wedge plasmonic waveguide with extreme light confinement and good fabrication error tolerance
Author(s) -
Li Ding,
Jin Qin,
KaiDa Xu,
Liang Wang
Publication year - 2016
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.24.003432
Subject(s) - wedge (geometry) , optics , materials science , plasmon , waveguide , nanophotonics , surface plasmon polariton , fabrication , optoelectronics , surface plasmon , dielectric , physics , medicine , alternative medicine , pathology
We studied a novel long range hybrid tube-wedge plasmonic (LRHTWP) waveguide consisting of a high index dielectric nanotube placed above a triangular metal wedge substrate. Using comprehensive numerical simulations on guiding properties of the designed waveguide, it is found that extreme light confinement and low propagation loss are obtained due to strong coupling between dielectric nanotube mode and wedge plasmon polariton. Comparing with previous studied hybrid plasmonic waveguides, the LRHTWP waveguide has longer propagation length and tighter mode confinement. In addition, the LRHTWP waveguide is quite tolerant to practical fabrication errors such as variation of the wedge tip angle and the horizontal misalignment between the nanotube and the metal wedge. The proposed LRHTWP waveguide could have many application potentials for various high performance nanophotonic components.