Open AccessHybrid wedge plasmon polariton waveguide with good fabrication-error-tolerance for ultra-deep-subwavelength mode confinement
Author(s) -
Yusheng Bian,
Zheng Zhang,
Ya Liu,
Jiansheng Liu,
Jinsong Zhu,
Tao Zhou
Publication year - 2011
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.19.022417
Subject(s) - materials science , surface plasmon polariton , plasmon , figure of merit , optics , surface plasmon , polariton , wedge (geometry) , optoelectronics , fabrication , waveguide , dielectric , nanowire , physics , medicine , alternative medicine , pathology
A novel hybrid plasmonic waveguide consisting of a high-index dielectric nanowire placed above a triangular metal wedge substrate is proposed and analyzed theoretically. The strong coupling between the wedge plasmon polariton and the dielectric nanowire mode results in both the ultra-tight confinement and low propagation loss. Compared to the previous studied hybrid surface plasmon polariton structures without the metal wedge substrate, stronger field enhancement in the low-index gap region as well as improved figure of merit (FOM) could be realized simultaneously. Results of the modal properties considering certain fabrication imperfections show that the proposed structure is also quite tolerant to these errors.