Optimizing band-edge slow light in silicon-on-insulator waveguide gratings

Marco Passoni, Dario Gerace, Liam O'Faolain, Lucio Claudio Andreani

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
1 Downloads (Pure)


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.
Original languageEnglish
Article number315253
Pages (from-to)8470-8478
Number of pages9
JournalOptics Express
Issue number7
Publication statusPublished - 23 Mar 2018


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