Conventional data centers need an efficient interconnection network but electrical switching requires significant power consumption that grows with the data rate and the electrical part became the bottleneck of the transmission. Today different networks are connected by optical connections that allow to reach high data rates: switching at optical level is convenient. Introduction of optical switching would make an immediate improvement in energy efficiency since it eliminates the O/E/O (Optical/Electrical/Optical) conversions and they could address a larger amount of data increasing the performances. A candidate technology to sustain these switching devices is Silicon Photonics because it provides small footprint and low power consumption.