We report the performance an integrated silicon photonics transmitter. Without using any off-line DSP techniques at the receiver, experimental results demonstrate 182Gbps OOK and 308Gbps PAM-4 transmissions with the energy efficiency including driver, of better than 1pJ/bit.

Nanostructured metamaterials have opened unprecedented capabilities in photonics. Here, we discuss how their use combined with advanced design techniques based on optimization and machine learning can give access to complex behaviors, high performances and reduced footprint of both integrated and free space devices.

Despite having a lower birefringence compared to the silicon-on-insulator platform, the birefringence of the silicon nitride platform still poses an issue for many devices, hence the necessity of polarization control. In this presentation, we discuss our recent work on polarization beam splitters and polarization splitter-rotator, tailored to a wavelength of 950 nm, in response to the development of single photon sources at this wavelength.