Quantum Photonics includes the generation, emission, transmission, switching, amplification and, in general, covers the engineering and coherent control of quantum systems, i.e. down to the single photon level. It is a key enabling quantum technology, both for current device and system development in QKD, as well as future entangled quantum network applications.
On the applied side, we are exploiting a range of Integrated photonic technologies aimed at miniaturisation, compactness and scalability for QKD. On the more fundamental side, we are constantly exploring and developing novel approaches, exploiting classical, quantum and nonlinear optics, that allow us to produce single-, pair-, and multi-photon sources, with well defined and reproducible characteristics.
Our Quantum Photonics activities provide us with the tools for exploring fundamental aspects of quantum physics, understanding how to engineer quantum optical technologies, and allow us to expand the operating regimes for our quantum activities in communication, metrology and biophotonics.
Our primary goals are to investigate and engineer:
- Next generation photon sources
- Single photon frequency conversion interfaces
- Quantum-capable photonic integrated chips
A SiN reciever (Bob) chip for 2.5GHz-rate QKD system.
Some key publications are:
- High-rate photon pairs and sequential Time-Bin entanglement with Si3N4 microring resonators, F. Samara, A. Martin, C. Autebert, M. Karpov, T. J. Kippenberg, H. Zbinden, and R. Thew, Optics Express, 27, 19309 (2019).
- Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components, L. Oesterling, F. Monteiro, S. Krupa, D. Nippa, R. Wolterman, D. Hayford, E. Stinaff, B. Sanguinetti, H. Zbinden and R. Thew, Journal of Modern Optics, 62, 1722 (2015).
- Narrowband photon pair source for quantum networks, F. Monteiro, A. Martin, B. Sanguinetti, H. Zbinden, and R. Thew, Optics Express, 22, 4371 (2014).
- Pulsed source of spectrally uncorrelated and indistinguishable photons at telecom wavelengths, N. Bruno, A. Martin, T. Guerreiro, B. Sanguinetti and R. Thew, Optics Express, 22, 17246 (2014).
Contact: Rob Thew