Speaker
Description
Photonics platforms provide promising advantages for many applications in the field of quantum information processing and sensing. Bulk and free-space optical systems exhibit issues in terms of scalability, cost, reproducibility, and reconfigurability. A more intriguing platform is therefore given by integrated photonics circuits, which allow the miniaturization, reproducibility, and programmability of large-scale photonics processors. Recently, a big effort has been made to develop compact and high-quality scalable devices for the generation of squeezed states of light, a fundamental ingredient for quantum computation. Among different platforms, silicon nitride microring resonators offer the best performances in terms of generation of high-level squeezing. However, current measurements of squeezing on-chip are limited by the ratio of intrinsic to extrinsic quality factors, related to excess photon losses and inefficient light coupling. At Chalmers, we work with an ultralow loss subtractive processing method for the fabrication of dispersion-engineered strong confinement silicon nitride microresonators that allow for higher Q values than possible before.
