Open AccessMode converter in metal-insulator-metal plasmonic waveguide designed by transformation optics
Author(s) -
XiangTian Kong,
Zu-Bin Li,
Jianguo Tian
Publication year - 2013
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.21.009437
Subject(s) - converters , optics , plasmon , transformation optics , materials science , energy conversion efficiency , waveguide , metal insulator metal , surface plasmon , coupled mode theory , optoelectronics , power (physics) , physics , refractive index , metamaterial , quantum mechanics , voltage , capacitor
A metal-insulator-metal (MIM) waveguide can support two plasmonic modes. Efficient conversion between the two modes can be achieved by reshaping of both phase and power density distributions of the guided mode. The converters are designed with the assistance of transformation optics. We propose two practical configurations for mode conversion, which only consist of homogeneous materials yielded from linear coordinate transformations. The functionalities of the converters are demonstrated by full wave simulations. Without consideration of transmission loss, conversion efficiency of as high as 95% can be realized.