Open AccessOptimizing band-edge slow light in silicon-on-insulator waveguide gratings
Author(s) -
Marco Passoni,
Dario Gerace,
L. О’Faolain,
Lucio Claudio Andreani
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.008470
Subject(s) - slow light , silicon on insulator , optics , materials science , grating , cladding (metalworking) , silicon , waveguide , optoelectronics , photonic integrated circuit , silicon photonics , refractive index , bandwidth (computing) , photonics , photonic crystal , physics , telecommunications , metallurgy , computer science
A systematic analysis of photonic bands and group index in silicon grating waveguides is performed, in order to optimize band-edge slow-light behavior in integrated structures with low losses. A combination of numerical methods and perturbation theory is adopted. It is shown that a substantial increase of slow light bandwidth is achieved when decreasing the internal width of the waveguide and the silicon thickness in the cladding region. It is also observed that a reduction of the internal width does not undermine the performance of an adiabatic taper.