Open AccessTailoring the dispersion behavior of silicon nanophotonic slot waveguides
Author(s) -
Sara Mas,
José Caraquitena,
J. V. Galán,
Pablo Sanchís,
J. Martí
Publication year - 2010
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.18.020839
Subject(s) - optics , dispersion (optics) , waveguide , materials science , refractive index , slot waveguide , modal dispersion , nanophotonics , channel spacing , silicon , wavelength , asymmetry , silicon photonics , physics , wavelength division multiplexing , optoelectronics , photonics , optical fiber , dispersion shifted fiber , fiber optic sensor , quantum mechanics
We investigate the chromatic dispersion properties of silicon channel slot waveguides in a broad spectral region centered at ~1.5 μm. The variation of the dispersion profile as a function of the slot fill factor, i.e., the ratio between the slot and waveguide widths, is analyzed. Symmetric as well as asymmetric geometries are considered. In general, two different dispersion regimes are identified. Furthermore, our analysis shows that the zero and/or the peak dispersion wavelengths can be tailored by a careful control of the geometrical waveguide parameters including the cross-sectional area, the slot fill factor, and the slot asymmetry degree.