Open AccessWide band dispersionless slow light in hetero-MIM plasmonic waveguide
Author(s) -
Dacheng Li,
Kang Du,
Shuhai Liang,
Wending Zhang,
Ting Mei
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.24.022432
Subject(s) - plasmon , optics , waveguide , materials science , dielectric , slow light , refractive index , group velocity , optoelectronics , metal insulator metal , dispersion (optics) , permittivity , surface plasmon , photonic crystal , physics , voltage , quantum mechanics , capacitor
A flat slow-light band over a wide frequency range is obtained in the hetero-MIM (metal-insulator-metal) waveguide with zero group velocity dispersion (GVD). The zero GVD originates from dispersion compensation by the photonic mode and the plasmonic mode, the mechanism of which does not exist in the homo-MIM structure. By changing dielectric permittivity of the insulator or the difference of two different metallic plasma frequencies, the group index and the bandwidth can be tuned. The dispersionless slow light characteristic in the hetero-MIM waveguide may be useful in the new design of plasmonic devices.