Citation:Passoni, M., Gerace, D., O’Faolain, L. and Andreani, L. C. (2018) 'Optimizing band-edge slow light in silicon-on-insulator waveguide gratings', Optics Express, 26(7), pp. 8470-8478. doi: 10.1364/OE.26.008470
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.
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