Giacomo Ferranti - Monolithic integration of homodyne detectors for high-speed CV quantum photonics
1On December 6 (Wednesday) the International Institute of Physics of UFRN will host a SEMINAR with Giacomo Ferranti, (Quantum Engineering Technology Labs - QET Labs). The seminar will happen in the auditorium of the IIP at 11:00 am.
Members of the local community are invited to participate
TITLE: Monolithic integration of homodyne detectors for high-speed CV quantum photonics
SPEAKER: Giacomo Ferranti, Quantum Engineering Technology Labs (QET Labs), Bristol
ABSTRACT: Balanced homodyned detectors (BHD) are ubiquitous in quantum technologies, with applications ranging from continuous-variable (CV) quantum computing to quantum sensing and quantum communication. One key performance metric of a BHD is the detection speed, as it limits quantum communication key rates and CV quantum computation clock rates. Co-packaging photonic integrated circuits with electronic transimpedance amplifiers has recently led to speed improvements, but the parasitic capacitance introduced by these packaging methods is still the main limiting factor to detection speed. In this talk, I will demonstrate a monolithic electronic-photonic homodyne detector achieving 16 dB of shot-noise clearance over a 3 dB bandwidth of 19.8 ± 0.1 GHz. This outperforms previous demonstrations and is directly attributable to the monolithic integration, which avoids the parasitic capacitance resulting from the packaging of integrated circuits. We infer the presence of shot noise clearance up to 100 GHz, beyond the range of our RF test equipment. These results demonstrate how monolithic integration of quantum photonics and classical electronics can lead to a drastic increase in performance for quantum technologies.