Multimode silicon photonics integrated devices

Mode-division-multiplexing (MDM) technology has attracted much attention because of the potential to enhance the capacity of an optical-interconnect link for a single wavelength carrier. In this case, one should consider not only the fundamental mode but also the higher-order modes for the design of photonic integrated devices, and thus some novel devices are required. As silicon photonics has become very popular because of their CMOS compatibility, it is interesting to develop some multimode photonic integrated devices on silicon. This paper gives a review on multimode silicon photonics.