Spatiotemporal quasisolitons and resonant radiation in arrays of silicon-on-insulator photonic wires

We have analyzed the conditions for low-power spatiotemporal soliton formation in arrays of evanescently coupled silicon-on-insulator photonic wires. We have verified that pronounced soliton effects can be observed in the presence of realistic loss, two- photon absorption, and higher-order dispersions. A soliton in an N-wire array can excite N resonant frequencies, but some of these may be suppressed due to the soliton having zero projection onto the corresponding radiation supermodes. This results in pronounced differences between the radiation spectra observed from solitons excited at the edge and in the center of arrays.